Click a link below to go directly to the section.
Date and time the SNMP agent was started, in the library's local time.
Type of event or activity that was in process when the alert was triggered.
Options are as follows:
AppMonitor – The alert was triggered during a restart of the STA application. This event type is not a selectable link.
Exchange – The alert was triggered during an exchange. Click the link to navigate to the Exchanges Overview screen displaying detail about the exchange.
MIB Walk – The alert was triggered during a Get Latest Data performed from the Configuration – SNMP Connections screen. This event type is not a selectable link.
Robot Analytic – The alert was triggered by a change in robot health. This event type is not a selectable link.
Trap – The alert was triggered by an SNMP trap from the library. Click the link to navigate to the All Messages – Overview screen displaying detail about the trap.
blank – Either the alert was triggered by an internal STA calculation, or the triggering event is unknown. In either case, there is no detail to display.
User-defined name assigned to the alert policy.
Type of alert policy. Examples are: STA, Complex, MDV, Media, Move, Robot.
Criteria of the alert policy that generated this alert.
Severity level of the alert policy that generated this alert. Options are: Severe, Warning, Informative. The severity level of a policy determines how often alerts are triggered.
Current state of the alert. Options are: New, Acknowledged, In-progress, Dismissed, Unknown. "New" and "Unknown" states are assigned by STA. All other states are user-assigned according to the optional alerts workflow implemented at your site.
LTO only
Cleaning media has been loaded in the drive.
LTO only
The drive has experienced an Automation Interface fault.
Both enterprise and LTO
A media error has caused a cleaning request.
Both enterprise and LTO
A clean threshold has been exceeded. Set when a StorageTek enterprise or IBM LTO drive detects that it needs routine cleaning.
LTO only
The drive has detected that a cooling fan is not operating within manufacturer-specified limits.
LTO only
A failure requiring diagnostics has occurred. Triggered by a tape alert 39. This alert is reset after diagnostics are run.
LTO only
A redundant interface port on the drive has failed.
Enterprise only
A drive dump created earlier is available. This alert is reset after the dump is downloaded.
If you see this alert, Oracle recommends you collect a drive dump and drive logs as soon as possible. This will assist Oracle Support with drive fault analysis.
Enterprise only
The drive event log is 75 percent or more full. This is an expected state, as the log is circular. Events may be overwritten unless they are collected. If Oracle Service Delivery Platform (SDP) is installed, the logs are cleared.
Both enterprise and LTO
The drive firmware has predicted a drive hardware failure.
LTO only
A drive firmware download has failed because an invalid firmware file was used for this drive type.
Both enterprise and LTO
The drive has detected a firmware fault and has reset itself. This alert remains active until all dumps are retrieved from the drive.
Retrieve the drive dumps.
LTO only
Indicates an unrecoverable read, write, or positioning error. This alert is cleared internally when the media is ejected.
Check the following alerts for additional detail: Media Error, Read Failure, Write Failure.
LTO only
The drive has experienced a hardware fault from which it can recover through a reset.
LTO only
The drive has experienced a hardware fault from which it can recover through a power cycle. This alert is set if the tape drive fails its internal power-on self-tests and is cleared internally when the drive is powered off.
LTO only
The drive has experienced a problem with the host interface. Check cables and connections and restart the operation.
Both enterprise and LTO
Indicates whether the drive exceeded its lifetime limit of media loads at the time of the exchange.
Enterprise only
The drive is down-level for the media attempting to be loaded.
Both enterprise and LTO
The drive has experienced a cooling problem. This could impact media integrity.
LTO only
Drive voltage limit has been exceeded
LTO only
A manual or forced eject occurred while the drive was reading or writing.
LTO only
The cleaning media is incompatible with the drive.
Indicates the cartridge memory failed during the exchange. This results in reduced performance.
Both Enterprise and LTO
The drive firmware has determined that the cleaning media has already been used the maximum number of times and cannot be used for this cleaning exchange.
LTO only
The volume state has been set not to allow partition 0 to use the full native capacity of the volume. For example, the volume is partitioned, or the available medium for use has been reduced by a SET CAPACITY command.
Both Enterprise and LTO
The media directory on the tape media is corrupted, leading to degraded file search performance until the directory is rebuilt. This has occurred because the drive was powered down with media loaded, or a permanent error prevented the media directory from being updated.
Both Enterprise and LTO
The media directory has been corrupted. No data was lost, but media performance could be impacted.
The media directory can be rebuilt by reading all the data.
LTO only
The eject operation has failed.
Eject the media, reload, and restart the operation.
Enterprise only
The media has reached the end of its warranty period, and further use is not covered by warranty.
Both enterprise and LTO
Media performance is severely degraded, or the media can no longer be read or written. This alert is set for any unrecoverable read, write, or positioning error caused by faulty media and is cleared internally when the media is ejected.
Both enterprise and LTO
The media has exceeded its expected useful life. Available for IBM LTO4 and above drives only.
Note:
HP drives report the Nearing Media Life Alert attribute instead.Both
The drive was unable to load the media and thread the tape.
Both
The media has exceeded the recommended number of drive loads.
Both
Some previously existing media statistics have been lost due to a drive or library being powered down with media loaded.
Enterprise only
Media in the drive requires physical maintenance, which must be corrected before the media can be loaded successfully. For example, the leader may be pulled into the cartridge.
The media is approaching the end of its expected useful life. Available for HP drives only.
Both
Start of customer data could not be found
LTO only
The drive has not been able to read the media recognition system stripes, indicating the media is not data-grade. Any data you write to the media is at risk.
LTO only
The tape has snapped or suffered a mechanical failure in the drive, but the media can still be ejected.
Enterprise only
The media RFID was found to be open at load time, indicating the drive was powered off before the media was unloaded on the previous mount. Results in degraded media performance. Writing is not allowed until End of Data is found.
Both
The system area on the media could not be read from at load time. No data was lost, but media performance could be impacted.
Both
The system area on the media could not be written to at unload. No data was lost, but media performance could be impacted.
Monitor the drive and media. If this error persists across multiple media, service the drive.
LTO only
The tape has snapped or suffered a mechanical failure in the drive and cannot be extracted. Do not attempt to eject the media.
Enterprise only
The tape has snapped in the drive and cannot be extracted. Do not attempt to eject the media.
Enterprise only
The media information record (MIR) was not updated sometime in the past, resulting in degraded file search performance.
The MIR can be rebuilt by reading all the data.
Enterprise only
A permanent media error occurred while the media was mounted. Check the exchange FSC or DSC for more information.
LTO only
Read has failed. The media is damaged or the drive is faulty.
LTO only
Media of this type is read-only in this drive. The media appears as write-protected.
Both
The drive has experienced severe trouble reading from the media.
The media or drive require attention.
LTO only
The media cannot be ejected because the drive is in use.
Wait until the operation has completed before ejecting the media.
LTO only
The drive reached the maximum number of unload retries and was unable to unload the media.
LTO only
Media of this type is not supported in this drive.
LTO only
The drive has detected an inconsistency during the WORM volume integrity checks. The media may have been tampered with.
LTO only
An attempt was made to overwrite user data on a WORM volume.
LTO only
The drive was unable to write data to the media. This alert is set for any unrecoverable write/positioning error, due to either faulty media or faulty drive hardware. The alert is cleared internally when the tape is ejected.
LTO only
A write command was attempted to write-protected media.
Both
The drive has experienced severe trouble writing to the media.
The media or drive require attention.
User-defined annotation assigned to the library resource or activity. List View shows the most recent annotation. Detail View shows full annotation history, in reverse chronological order.
Average megabytes read and written by the drive per exchange. Calculated as:
total MB (read +written) /total completed exchanges
Average throughput rate for the drive, in megabytes per second. Calculated as:
total MB (read +written) /total seconds mount time
Note:
This value may be affected by a variety of factors external to the drive, such as robot speed or application behavior—for example, some applications do not dismount media immediately upon completion of read/write operations, causing the drive to be idle for much of the mount. As a result, this value is not likely to represent the drive's maximum potential throughput rate.Average megabytes read by the drive per exchange. Calculated as:
total MB read /total completed exchanges
Average read rate for the drive, in megabytes per second. Calculated as:
total MB read /total seconds mount time
Note:
This value may be affected by a variety of factors external to the drive, such as robot speed or application behavior—for example, some applications do not dismount media immediately upon completion of read/write operations, causing the drive to be idle for much of the mount. As a result, this value is not likely to represent the drive's maximum potential read rate.Average megabytes written by the drive per exchange. Calculated as:
total MB written /total completed exchanges
Average write rate for the drive, in megabytes per second. Calculated as:
total MB written /total seconds mount time
Note:
This value may be affected by a variety of factors external to the drive, such as robot speed or application behavior. For example, some applications do not dismount media immediately upon completion of read/write operations, causing the drive to be idle for much of the mount. As a result, this value is not likely to represent the drive's maximum potential write rate.Serial number of the CAP
Current CAP accessibility state, as reported by the library. Options are: ALLOW, CLOSED ALLOW, PREVENT, CLOSED PREVENT.
Total alerts generated for this CAP, AEM, or mailslot, based on defined STA alert policies
Note:
This field links to the Alerts Overview screen, list view, which lists alerts for this CAP. See "Alerts Screens".Total CAPs, AEMs (SL3000 only), and mailslots (SL150 only)
For Complexes Overview and Libraries Overview: Total media ejected from the library or complex through all CAPs, AEMs (SL3000 only), and mailslots (SL150 only).
For CAPs Overview: Total media ejected through the CAP
For Complexes Overview and Libraries Overview: Total media entered into the complex through all CAPs, AEMs (SL3000 only), and mailslots (SL150 only)
For CAPs Overview: Total media entered through the CAP
Unique identifier for the CAP
Library internal address.
For SL150 libraries, the format is m,s,w,c (for example, 1,Left,1,2), where:
m =module number; 1–10, from top (base module) to bottom
s =side; Left or Right
w =row number; 1–3, from top to bottom
c =column number; 1–5, from front to back
For SL500 libraries, the format is l,m,r,c (for example, 0,2,2,3), where:
l =for nonpartitioned libraries, this is the library ID (always 0); for partitioned libraries, this is the partition ID (1–8).
m =module number; 1–5, from top to bottom of the rack
r =drive row number; 1–2 (Base Module) or 1–4 (Drive Expansion Module), from top to bottom of the module
c =column number; always 9 for drives
For SL3000 and SL8500 libraries, the format is l,r,c,s,w (for example, 1,1,2,2,3), where:
l =library number. For nonpartitioned libraries, this is the library ID; for partitioned libraries, this is the partition ID (1–8).
r =rail number. For SL3000 libraries, this value is always 1. For SL8500 libraries, possible values are 1, 2, 3, or 4.
c =column number.
s =side number.
w =row number.
Total CAP messages received from the library. A sudden increase in this number indicates a condition that should be investigated.
Current CAP state, as reported by the library. STA updates this value hourly. Additionally for SL3000 and SL8500 libraries, the value is updated as SNMP traps for the CAP are received from the library.
Options are:
OPEN—CAP is open.
CLOSED—CAP is closed.
AUDITING—CAP is undergoing an audit by the robot.
Volume serial number (VSN or volser) assigned to the media by its external label. If the library does not supply the volser, STA provides one composed of Library Serial Number:Physical Address.
Note:
Not all cleaning media have a volser starting with "CLN".Note:
This field links to the Media – Overview screen, detail view, which displays all available detail for this media. See "Media Overview and Analysis Screens".For Drives Overview: Indicates whether cleaning media has been loaded in the drive.
For Media Overview and Exchanges Overview: Indicates whether this is a cleaning media, as determined by the media domain and type. Possible values: True or False.
Note:
Not all cleaning media have a volser starting with "CLN".Total successful cleaning operations performed. This count does not include cleaning exchanges in which the mount failed or the cleaning media was expired.
Note:
This field links to the Drives – Cleaning Activities screen, list view, which lists this drive's cleaning exchanges. The Cleaning Activities screen reports both successful and unsuccessful cleaning exchanges. See "Drive Cleanings Overview Screen".Total libraries in the complex (always "1" for non-SL8500 libraries).
Note:
This field links to the Libraries – Overview screen, list view, which lists all libraries in this complex. See "Libraries Overview Screen".Unique identifier for the resource involved in the alert. The type of ID depends on the alert. For example, a volume serial number (for media), drive serial number (for drives), library serial number (for libraries).
Total time the library has been running since the last reboot. Displayed as hh:mm:ss.
Total times the cleaning media has been mounted in a drive. Some media types track this count, in which case, this value is as reported by the media itself. Other media types do not track this count, in which case, this value is as recorded by STA. Since the cleaning media may have been used prior to the start of STA monitoring, STA may not have exchange records for all drive cleanings done with the media.
Compression ratio for the exchange. Displayed as ratio, calculated as:
(Total uncompressed data sent or received by the drive / Total compressed data read or written to the media) :1
Date and time when the alert was triggered.
Internal library functionality that is producing the message. For example, "AuditDaemon" indicates logging information from the library audit function.
Values come directly from the library and vary by library model, firmware level, and hardware configuration. The values may reflect significant library events or configuration changes, such as "reboot" or "setPartition." To troubleshoot library issues, it may be useful to sort or filter the All Messages – Overview screen by this attribute.
Library internal address of the device associated with the SNMP trap.
For SL150 libraries, the format is m,s,w,c (for example, 1,Left,1,2), where:
m =module number; 1–10, from top (base module) to bottom
s =side; Left or Right
w =row number; 1–3, from top to bottom
c =column number; 1–5, from front to back
For SL500 libraries, the format is l,m,r,c (for example, 0,2,2,3), where:
l =for nonpartitioned libraries, this is the library ID (always 0); for partitioned libraries, this is the partition ID (1–8).
m =module number; 1–5, from top to bottom of the rack
r =drive row number; 1–2 (Base Module) or 1–4 (Drive Expansion Module), from top to bottom of the module
c =column number; always 9 for drives
For SL3000 and SL8500 libraries, the format is l,r,c,s,w (for example, 1,1,2,2,3), where:
l =library number. For nonpartitioned libraries, this is the library ID; for partitioned libraries, this is the partition ID (1–8).
r =rail number. For SL3000 libraries, this value is always 1. For SL8500 libraries, possible values are 1, 2, 3, or 4.
c =column number.
s =side number.
w =row number.
FRU ID of the device associated with the event.
Serial number or other unique identifier of the device associated with the event.
State of the device at the time the trap was sent. Varies by device type, as in the following examples:
Drives – EMPTY, LOADED, NEEDS_CLEANING
CAPs – OPEN, CLOSE, UNKNOWN
Pass-thru ports (PTPs) – OK, ERROR, WARNING, INFO, TRACE
Date and time of the event, in UTC standard format.
Total dismounts for all drives.
Note:
This field links to the Exchanges Overview screen, which lists exchanges for this library. See "Exchanges Overview Screen".Total dismounts for this drive or media in which an error occurred during the exchange. The error could be due to issues with the drive, the media, or both.
Note:
This field links to the Exchanges Overview screen, which lists the exchanges with errors. See "Exchanges Overview Screen".Electronic serial number of the drive. *NO-SERIAL* indicates it is not known.
Note:
This field links to the Drives – Overview screen, detail view, which displays all available details for this drive. See "Drives Overview and Analysis Screens".Total alerts generated for this drive, based on defined STA alert policies
Note:
This field links to the Alerts Overview screen, list view, which lists alerts for this drive. See "Alerts Screens".Total drive slots installed but not necessarily activated for use. Calculated as:
Drive Slots Occupied + Drives Slots Unoccupied.
Total drive slots with drives installed.
Note:
This field links to the Drives – Overview screen, list view, which lists all drives for this complex. See "Drives Overview and Analysis Screens".Total drive slots with no drives installed.
Total successful drive cleans performed. This count does not include cleaning exchanges in which the mount failed or the cleaning media was expired.
Note:
This field links to the Drives – Cleaning Activities screen, list view, which lists cleaning exchanges for this library. The Cleaning Activities screen reports both successful and unsuccessful cleaning exchanges. See "Drive Cleanings Overview Screen".Total times media have been unloaded from this drive.
Note:
This field links to the Exchanges Overview screen, list view, which lists this drive's exchanges. See "Exchanges Overview Screen".Status of the drive upon completion of the exchange, as derived from a variety of factors, including drive errors, write efficiency, and read margin. Possible values:
CART_MEM_FAILURE – An error has occurred with the cartridge memory; this results in reduced performance.
CLEAN_REQ – The drive is due for cleaning.
DRIVE_ERROR – The drive has experienced a hardware or microcode error.
ENCRYPT_ERROR – An error has occurred with the encryption key management system. This is neither a drive nor media problem, so there is no effect on the suspicion of the drive or media.
Possible causes for this status include the following: compromised network connectivity to the encryption key server; the encryption key server is down; the drive key enrollment has expired and the drive must be re-enrolled; either the drive or the media is not encryption-capable. It may be possible for the drive to read unencrypted media until the encryption issue is resolved.
EXPIRED_CLEAN_TAPE – The cleaning media has expired.
FAILED_MOUNT
FATAL_ERROR – The media cannot be mounted or is stuck. Possible reasons include a problem with the drive hardware or the media cartridge.
FW_DOWN_LEVEL – The drive firmware is downlevel.
GOOD – The exchange completed with no issues.
INCOMPLETE_UNLOAD – The application requested that the media be unloaded. The drive has detected data still in its buffer and has asked for confirmation from the application.
INVALID_OPERATION – The host has requested a an invalid operation, such as any of the following: mounting media in an incompatible drive; reading from media that is blank; writing on media that is write-protected; attempting to locate a position beyond the beginning or end of the tape.
LOAD_ERROR – An issue with the media prevented it from being loaded. Possible causes include: a problem with the drive hardware or microcode; a problem with the cartridge leader.
LTO_NON_ADI_MODE –ADI mode has not been enabled on either the library, the drive, or both.
MEDIA_ERROR – The media cannot be read or written. Possible causes include a problem with the tape medium or the MIR.
NON_DRV_ERROR – This is neither a drive nor media problem, so there is no effect on the suspicion of the drive or media. For additional information, check the following: for Enterprise drives, check the exchange fault symptom code (FSC); for LTO drives, check recent tape alerts.
Possible causes for this status are as follows:
* A Media Write Protect Tape Alert must be set. The host application is attempting to write to media that has been write protected.
* FSC has been set to 3627, 3629, 362A, or 362B. These FSC codes are set during a "normal operation," which checks that a piece of media is truly blank before labeling it. The host application will perform the following sequence: 1) mount new tape; 2) attempt to check for no label; 3) label the new tape.
OTHER_DRV_ERROR
OTHER_ERROR
PERM_ERROR – A permanent error occurred on the exchange. This may be the result of a media format error, possibly from a previous exchange.
READ_ERROR – The media could not be read. Possible causes include: a problem with the drive hardware or microcode; a problem with the media MIR; the media may have been corrupted during a previous mount; the drive and media may be incompatible
UNKNOWN – STA has not received enough exchange data from the library to calculate drive health. It may be that the drive is not supported (LTO 2, for example) or the library firmware is downlevel.
UNLOAD_ERROR – An error occurred during the unload operation. Possible causes include: a problem writing to the media RFID or MIR; the drive and media may be incompatible.
WRITE_ERROR – An error occurred during the write operation. Possible causes include: a problem with the drive hardware or microcode; the media may have been corrupted during a previous exchange; the drive and media may be incompatible.
Drive firmware and host interface level. See the STA Requirements Guide for details on whether this firmware version supports rich data for STA.
Drive health as computed by STA analytics. This is a point-in-time value based on data gathered from the drive during current and past exchanges. It reflects a variety of factors, such as the drive's error history, read margin, and write efficiency.
This value includes all data up to and including the last completed exchange. It is updated immediately after each completed exchange involving the drive.
Possible values, in order of degrading health:
USE – The drive has had no failures or degradation in the last ten exchanges
MONITOR – The drive has had multiple errors; there is a less than 80 percent chance that it needs service.
EVALUATE – The drive has had multiple errors; there is a greater than 80 percent chance that it needs service.
ACTION – The drive has had an error that requires attention. The drive may require service. You should investigate and determine a proper course of action.
UNKNOWN – STA has not received enough data to compute health for the drive. This may be due to a variety of factors, including an unsupported drive model, downlevel drive firmware, or ADI mode not enabled for an LTO drive.
Note:
STA only receives information about errors detected by a drive while performing read/write activity to a media. STA does not receive information about errors that may occur in the data path or the host application.Note:
Cleaning exchanges have a neutral impact on drive health.Note:
This attribute is not to be confused with the drive status reported by the library; see "Last Drive Message" for comparison.Trend of drive health between the last two exchanges, as computed by STA analytics. Options are: BETTER, UNCHANGED, WORSE.
Host Library Interface (HLI) address of the location. Applies only to drives or media slots in HLI partitions or libraries. This address is assigned by the ACSLS or ELS host software.
Note:
Available only for SL8500 libraries with firmware FRS_7.80 or higher or SL3000 libraries with firmware FRS_4.0 or higher. For all others, the value is left blank.For media slots, format is l,p,w,c, where:
l =logical storage manager (LSM) number. Possible values are 0, 1, 2, or 3.
p =panel number.
r =row number.
c =column number.
For drives, format is l,p,t, where:
l =logical storage manager (LSM) number. Possible values are 0, 1, 2, or 3.
p =panel number
t =transport number
Host interface type for the drive. Possible values:
SAS – Serial Attached SCSI
SCSI – Small Computer System Interface
FIBRE – Fibre channel
UNKNOWN – The library did not report the interface type.
User-assigned name for the library. Assigned in the Settings – SNMP Connections screen.
Unique ID assigned to the library.
Library frame serial number.
Note:
This field links to the Libraries – Overview screen, detail view, which displays all available details for this library. See "Libraries Overview Screen".Total cleans performed on the drive over its life.
Note:
The drive life may be longer than the time it has been monitored by STA.Total hours the drive heads have been in motion over the life of the drive.
Note:
The drive life may be longer than the time it has been monitored by STA.Total media loads for the drive over its life. Available for all drive types but LTO3.
Note:
The drive life may be longer than the amount of time it has been monitored by STA.Total meters of tape that have passed through the drive heads over the drive's life. Available for all drive types but LTO3.
Note:
The drive life may be longer than the amount of time it has been monitored by STA.Total meters of media passed through the drive heads over the life of the drive.
Total positioning meters of media passed at high speed through the drive heads over the life of the drive. Positioning meters occur during locate, rewind, and spacing operations.
Total hours the drive has been powered on over its life.
Note:
The drive life may be longer than the amount of time it has been monitored by STA.Drive manufacturer.
For example, STK, IBM, QUANTUM, and so on.
Drive model short description. For example, T10000C, LTO4, and so on. UNKNOWN indicates a broken drive or a drive for which STA cannot determine the type.
Note:
Type is UNKNOWN for all DLT and SDLT drives, for which STA does not compute health.Library internal address for the drive.
For SL150 libraries, the format is m,p (for example, Module 1,Bottom Drive), where:
m =module number; 1–10, from top (base module) to bottom
p =position; Top Drive or Bottom Drive
For SL500 libraries, the format is l,m,r,c (for example, 0,2,2,3), where:
l =for nonpartitioned libraries, this is the library ID (always 0); for partitioned libraries, this is the partition ID (1–8).
m =module number; 1–5, from top to bottom of the rack
r =drive row number; 1–2 (Base Module) or 1–4 (Drive Expansion Module), from top to bottom of the module
c =column number; always 9 for drives
For SL3000 and SL8500 libraries, the format is l,r,c,s,w, where:
l =library number. For nonpartitioned libraries, this is the library ID; for partitioned libraries, this is the partition ID (1–8).
r =rail number. For SL3000 libraries, this is always "1". For SL8500 libraries, this is the rail number (1–4).
c =column number.
s =side number.
w =row number.
Date and time when the drive properties were last updated. Initially set to the date and time when STA first recognized the drive, and updated whenever subsequent updates occur, such as updating the drive firmware.
Rail number. For SL150, SL500, and SL3000 libraries, this value is always 1. For SL8500 libraries, possible values are 1, 2, 3, or 4.
Drives used: Drives Overview, Exchanges Overview
SCSI element ID of the drive location. Applies only to drives in SCSI partitions or libraries. See the applicable library User's Guide for details on how SCSI IDs are assigned.
A value of "-1" indicates the drive is not in a SCSI slot. For example, it may be in a SL8500 library, an HLI partition in a SL3000 library, or a slot not allocated to a partition in a partitioned library.
Electronic serial number of the drive. *NO-SERIAL* indicates it is not known.
Note:
This field links to the Drives – Overview screen, detail view, which displays all available details for this drive. See "Drives Overview and Analysis Screens".Total drive messages received from the library over the last 30 days. A sudden increase in this number indicates a condition that should be investigated.
Note:
This field links to the Drives – Messages screen, list view, which lists SNMP traps for this drive. See "Messages Screens".Date and time when STA first began tracking this drive serial number.
Date and time when STA stopped tracking this drive serial number. This is when STA determined the drive serial number no longer exists in any of the monitored libraries and updated the drive status from "missing" to "removed".
Calculated suspicion level for the drive. Possible values: 0–100. Lower numbers are desirable. The higher the number, the higher the probability the drive needs attention.
Serial number of the drive tray, which must be entered manually by an Oracle support representative. Valid entries include alphanumeric characters only; no special characters are allowed. If the entry has not yet been entered, the value is "unknown."
This entry is referenced when a Service Request is submitted.
Drive type long description sent by the library. For example, T10000c-Enc, HpUltrium4, and so on. UNKNOWN indicates a broken drive or a drive for which STA cannot determine the type.
Note:
Type is UNKNOWN for all DLT and SDLT drives, for which STA does not compute health.Drive manufacturer
World Wide Node Name for the drive slot.
World Wide Port Name for drive port A. This is automatically generated by the library controller during library initialization.
World Wide Port Name for drive port B. This is automatically generated by the library controller during library initialization.
STA has detected that the volume serial number (VSN or volser) of the media used in the exchange is a duplicate. This alert appears only on the exchange in which the duplicate is detected.
Duplicate volsers occur when two pieces of media with the same media type have the same volser and two different manufacturer serial numbers. If this alert appears multiple times for the same volser, it is likely there is more than one physical media with the same media type and volser label in the tape environment. If it only appears once for the volser, it may be that the volser label from a retired media has been re-used on a new media.
Serial number of the elevator
Total alerts generated for this elevator, based on defined STA alert policies
Note:
This field links to the Alerts Overview screen, list view, which lists alerts for this elevator. See "Alerts Screens".Total elevators. Applies to SL8500 libraries only.
Unique identifier for the elevator
Library internal address.
For SL150 libraries, the format is m,s,w,c (for example, 1,Left,1,2), where:
m =module number; 1–10, from top (base module) to bottom
s =side; Left or Right
w =row number; 1–3, from top to bottom
c =column number; 1–5, from front to back
For SL500 libraries, the format is l,m,r,c (for example, 0,2,2,3), where:
l =for nonpartitioned libraries, this is the library ID (always 0); for partitioned libraries, this is the partition ID (1–8).
m =module number; 1–5, from top to bottom of the rack
r =drive row number; 1–2 (Base Module) or 1–4 (Drive Expansion Module), from top to bottom of the module
c =column number; always 9 for drives
For SL3000 and SL8500 libraries, the format is l,r,c,s,w (for example, 1,1,2,2,3), where:
l =library number. For nonpartitioned libraries, this is the library ID; for partitioned libraries, this is the partition ID (1–8).
r =rail number. For SL3000 libraries, this value is always 1. For SL8500 libraries, possible values are 1, 2, 3, or 4.
c =column number.
s =side number.
w =row number.
Current state of the elevator power LED. Normal condition is ON. Options are: ON, OFF, or UNKNOWN.
Total elevator messages received from the library. A sudden increase in this number indicates a condition that should be investigated.
Current elevator state, as reported by the library. Examples are: READY. STA updates this value hourly and as SNMP traps for the elevator are received from the library.
Indicates whether the drive is capable of supporting encryption, but does not necessarily indicate that encryption has been enabled. Possible values are Yes or No.
Note:
Additional hardware or software components may be necessary to actually enable encryption on the drive. For example HP LTO-4 drives require a Deoni card and IBM LTO-4 drives require a Belisarius card.Indicates whether the drive needed cleaning at the time of the exchange. Possible values: Yes or No.
Note:
Additional detail may be available through the Clean Periodic Alert and Clean Now Alert attributes.Data status code for the exchange. Available only for drives whose firmware supports TTI 5.40.
Total time the media is involved in the exchange, including transit time immediately before and after the mount. Starts at the beginning of the move to retrieve the media from a media slot and ends when the media is placed in the first available location after removal from the drive. For SL8500 libraries, the first available location after removal from the drive could be an elevator, but for all other libraries, it is always a media slot. Displayed in hh:mm:ss format.
Encryption method used by the drive for the exchange. Available for StorageTek enterprise drives only. Possible values:
Encrypted_ANSI_10 – ANSI encryption.
Encrypted Sun KMS – Oracle Key Manager (OKM) encryption.
Not Encrypted – Not encrypted.
Unknown – The drive did not report encryption information.
Blank (no value displayed) – STA did not receive any encryption information; the value is always blank for ADI/LTO exchanges.
Date and time when the exchange completed
Four-byte hexadecimal fault symptom code (FSC). For example, FD55, S053, and so on. Reported only if an error occurred during the exchange.
User-assigned name for the library where the most recent exchange occurred. If the media has been ejected, you can use this value to determine the library from which the media was ejected. Enables reporting of library information if the media has been ejected.
Total time the media is mounted in the drive. Includes the total time between the start of the mount and the start of the dismount. Does not include transit time before and after the mount. Displayed in hh:mm:ss format.
If this attribute is blank, then it is likely that STA did not receive all the exchange data from the library.
Amount of error correction code (ECC) read margin remaining on the media, as reported by the drive during the last mount. Reported as a percentage. A high value is desirable. Available only for StorageTek T10000C and T10000D drives.
If STA determines that this value has gone below a threshold for this drive type, the Exchange Read Marginal attribute is set to True.
The Exchange Read Margin graph on the Drives – Overview and Media – Overview screens shows a system average over time for all drives. Because not all drive types report read margin, the system average may vary significantly over time, depending on which drives had exchange activity during the reported period. If there are no exchanges for T10000C and T10000D drives on a given date, the value is set to zero for that day.
Indicates whether the drive met the read margin standard for the drive type. Possible values: True or False. Available only for StorageTek T10000C and T10000D drives.
Recording format used by the drive during the exchange or media validation. For Exchanges Overview, options include: T10000D, LTO5, and 9840B.
For Media Validation Overview, options are: T10000A, T10000B, T10000C, and T10000D only. T10000A and T10000B drives can write to T10000T1 media; T10000C and T10000D drives can write to T10000T2 media.
Date and time when the drive was reserved for the exchange, cleaning activity, or media validation activity.
Note:
This field links to the Exchanges Overview screen, detail view, which displays all available detail for this exchange. See "Exchanges Overview Screen".Number of Informational tape alerts received in the exchange.
Number of Severe tape alerts received in the exchange.
Number of Warning tape alerts received in the exchange.
Write efficiency for the exchange, based on capacity over distance. Reported as a percentage. A high value is desirable. Available only for StorageTek T10000C and T10000D drives.
If STA determines that this value has gone below a threshold for this drive type, the Exchange Write Inefficient attribute is set to True.
The Exchange Write Efficiency graph on the Drives – Overview and Media – Overview screens shows a system average over time for all drives. Because not all drive types report write efficiency, the system average may vary significantly over time, depending on which drives had exchange activity during the reported period. If there are no exchanges for T10000C and T10000D drives on a given date, the value is set to zero for that day.
Indicates whether the drive failed to meet the write efficiency standard for the drive type. Possible values: True or False. Available only for StorageTek T10000C and T10000D drives.
Total host database synchronization errors.
Total host requests that ended in timeouts.
Four-byte hexadecimal code indicating the status of the drive. Available for HP drives only.
Four-byte hexadecimal code indicating the status of the media. Available for HP media only.
Three-byte hexadecimal code indicating the drive's efficiency over its life. Possible values are 01h (best) to FFh (worst); 00h indicates the efficiency is unknown. Available for IBM LTO4 and above drives only.
Three-byte hexadecimal code indicating the media's efficiency over its life. Possible values are 01h (best) to FFh (worst); 00h indicates the efficiency is unknown. Available for IBM LTO4 and above drives only.
Interface type of the device associated with the event.
Current condition of the CAP as reported directly by the library. Options are: DEGRADED, NORMAL, NOTOPERATIVE, UNKNOWN.
Current condition of the drive as reported directly by the library. Updated whenever messages for the drive are received by STA from the library. Possible values:
DEGRADED – The drive has experienced an error.
NORMAL – The drive is functioning normally.
NOTOPERATIVE – The library has lost communication with the drive, or the drive has experienced an error or mechanical failure.
UNKNOWN – STA has not received any messages for the drive. This is the default value until the first message is received for the drive.
Note:
This attribute is not to be confused with the drive health calculated by STA; see "Drive Health" for comparison.Current condition of the elevator as reported directly by the library. Options are: DEGRADED, NORMAL, NOTOPERATIVE, UNKNOWN.
Date and time when the drive was reserved for the most recent exchange.
Note:
This field links to the Exchanges Overview screen, detail view, which displays all available details for this exchange. See "Exchanges Overview Screen".Current condition of the library as reported directly by the library. Updated whenever messages for the library top-level state are received by STA from the library. Possible values:
DEGRADED –The library has experienced an error.
NORMAL – The library is functioning normally.
NOTOPERATIVE – The library is not operating.
Null (no value displayed) – STA has not received any messages from the library. This is the default value until the first message is received for the library.
Current condition of the pass-through port (PTP) as reported directly by the library. Applies to SL8500 libraries only. Options are: DEGRADED, NORMAL, NOTOPERATIVE, UNKNOWN.
Current health of the robot as reported by the library. Options are: DEGRADED, NORMAL, NOTOPERATIVE, UNKNOWN.
Note:
This attribute is not to be confused with the robot health computed by STA; see "Robot Health" for comparison.Note:
This attribute is updated only on completion of a library data collection. Regular data collections are done automatically, or you may initiate a manual data collection at any time. See the STA User's Guide for details.Library frame serial number.
Note:
This field links to the Libraries – Overview screen, detail view, which displays all available details for this library. See "Libraries Overview Screen".Total alerts generated for this library, based on defined STA alert policies
Note:
This field links to the Alerts Overview screen, list view, which lists alerts for this library. See "Alerts Screens".Name assigned to the complex by STA.
For SL150, SL500, and SL3000 libraries, this value is formatted as library_model_library_serial_number. Examples: SL150_262960B+1234BA0018, SL500_522000001839, SL3000_571000020075
For SL8500 libraries, this value is formatted as library_model_complex_ID. Examples: SL8500_1, SL8500_4
This field links to the Libraries – Complexes Overview screen, detail view, which displays all available details about this complex. See "Library Complexes Screen".
Total alerts generated for this library complex, based on defined STA alert policies
Note:
This field links to the Alerts Overview screen, list view, which lists alerts for this complex. See "Alerts Screens".Name assigned to the complex by STA.
For SL150, SL500, and SL3000 libraries, this value is formatted as library_model_library_serial_number. Examples: SL150_262960B+1234BA0018, SL500_522000001839, SL3000_571000020075
For these library models, because the attribute value includes the library serial number and there can be only one library per complex, the Library Complex Name for each library is always unique and does not change.
For SL8500 libraries, this value is formatted as library_model_complex_ID. Examples: SL8500_1, SL8500_4
For SL8500 libraries, the attribute value is unique for each complex, but because a complex can include multiple libraries, multiple libraries can share the same Library Complex Name. The value assigned to a library changes if the library is moved from one complex to another.
Note:
This field links to the Libraries – Complexes Overview screen, detail view, which displays all available details about this complex. See "Complexes Overview Screen".Library complex ID, as configured on the library. For SL150, SL500, and SL3000 libraries, the value is always "1". For SL8500 libraries, the value is set by your Oracle support representative and must be unique for each complex.
Date and time of last library firmware update.
Current library firmware version.
IP address of the public port on the library. The attribute value is specified by the user or administrator when the library connection is configured. For SL150 libraries, it is the Network Port 1 port; for SL500 libraries, it is the 1B port; for SL3000 and SL8500 libraries, it is the 2B port.
Note:
For SL3000 and SL8500 libraries using the Redundant Electronics feature, this should be the 2B port on the active controller card.The attribute value is specified by the user or administrator when the library connection is configured. For and SL150 and SL500 libraries, this attribute is always blank.
For SL3000 and SL8500 libraries, this entry enables STA to maintain uninterrupted SNMP communications with the library if either a Redundant Electronics switch or a Dual TCP/IP failover occurs, and it may be any of the following:
For libraries with the Redundant Electronics feature, it is the IP address of the 2B port on the alternate (standby) controller card.
For libraries with the Dual TCP/IP feature, it is the IP address of the 2A port on the active controller card.
For libraries with both features, it may be either of the above, depending on what the user or administrator has specified. See the STA Installation and Configuration Guide for detailed instructions on configuring the libraries for STA.
For libraries with neither of these features, this attribute is blank.
Date and time the library was last rebooted. Provided only for SL150 and SL500 libraries.
Library model number. Possible values: SL150, SL500, SL3000, or SL8500.
User-assigned name for the library. Assigned in the Settings – SNMP Connections screen.
Unique ID assigned to the library.
Date and time when the most recent successful library configuration data collection was completed.
Library frame serial number.
Note:
This field links to the Libraries – Overview screen, detail view, which displays all available details for this library. See ""Libraries Overview Screen"".Total SNMP traps received by STA from the library. Includes traps for any of the following: library, drive, CAP or mailslot, and pass-thru port (PTP) status, library environment checks, library logs, library connection tests, and library configuration data collections.
Note:
This field links to the Libraries – Messages screen, list view, which lists SNMP traps for this library. See "Messages Screens".Library World Wide Node Name.
Total head-motion hours during which incompatible media was loaded over the life of the drive.
Logical groups to which the drive or media is assigned
For Complexes Overview and Libraries Overview: Total megabytes read and written by all drives in the library or complex.
For Drives Overview: Total megabytes read and written by the drive.
For Media Overview: Total megabytes read from and written to the media
For Complexes Overview and Libraries Overview: Total megabytes read by all drives in the library or complex.
For Drives Overview: Total megabytes read by the drive.
For Media Overview: Total megabytes read from the media
For Complexes Overview and Libraries Overview: Total megabytes uncompressed data received from hosts by all drives in the library or complex.
For Drives Overview: Total megabytes received by the drive from hosts during write operations. This could be compressed or uncompressed megabytes, depending on the host application.
For Media Overview: Total megabytes written to the media from hosts. The data could be compressed or uncompressed megabytes, depending on the host application.
For Complexes Overview or Libraries Overview: Total megabytes uncompressed data sent to hosts by all drives in the library or complex.
For Drives Overview: Total megabytes sent by the drive to hosts during read operations. This could be compressed or uncompressed megabytes, depending on whether compression has been enabled on the drive.
For Media Overview: Total megabytes sent from the media to hosts. This could be compressed or uncompressed megabytes, depending on whether compression has been enabled on the drive.
For Complexes Overview or Libraries Overview: Total megabytes written by all drives in the library or complex.
For Drives Overview: Total megabytes written by the drive.
For Media Overview: Total megabytes written to the media
Volume serial number (VSN or volser) assigned to the media by its external label. If the library does not supply the volser, STA provides one composed of Library Serial Number:Physical Address.
Note:
This field links to the Media – Overview screen, detail view, which displays all available detail for this media. See "Media Overview and Analysis Screens".Total alerts generated for this media, based on defined STA alert policies
Note:
This field links to the Alerts Overview screen, list view, which lists alerts for this media. See "Alerts Screens".Media's total auxiliary memory at the time of manufacture, in bytes
Indicates the media has never had data written to it.
Percentage of the total media capacity that has been used by data. Calculated as:
Media MB Avail Pre / Media MB Capacity
Host Library Interface (HLI) address of the location. Applies only to drives or media slots in HLI partitions or libraries. This address is assigned by the ACSLS or ELS host software.
Note:
Available only for SL8500 libraries with firmware FRS_7.80 or higher or SL3000 libraries with firmware FRS_4.0 or higher. For all others, the value is left blank.For media slots, format is l,p,w,c, where:
l =logical storage manager (LSM) number. Possible values are 0, 1, 2, or 3.
p =panel number.
r =row number.
c =column number.
For drives, format is l,p,t, where:
l =logical storage manager (LSM) number. Possible values are 0, 1, 2, or 3.
p =panel number
t =transport number
Unique ID assigned to the library.
Library internal address.
For SL150 libraries, the format is m,s,w,c (for example, 1,Left,1,2), where:
m =module number; 1–10, from top (base module) to bottom
s =side; Left or Right
w =row number; 1–3, from top to bottom
c =column number; 1–5, from front to back
For SL500 libraries, the format is l,m,r,c (for example, 0,2,2,3), where:
l =for nonpartitioned libraries, this is the library ID (always 0); for partitioned libraries, this is the partition ID (1–8).
m =module number; 1–5, from top to bottom of the rack
r =drive row number; 1–2 (Base Module) or 1–4 (Drive Expansion Module), from top to bottom of the module
c =column number; always 9 for drives
For SL3000 and SL8500 libraries, the format is l,r,c,s,w (for example, 1,1,2,2,3), where:
l =library number. For nonpartitioned libraries, this is the library ID; for partitioned libraries, this is the partition ID (1–8).
r =rail number. For SL3000 libraries, this value is always 1. For SL8500 libraries, possible values are 1, 2, 3, or 4.
c =column number.
s =side number.
w =row number.
Rail number. For SL150, SL500, and SL3000 libraries, this value is always 1. For SL8500 libraries, possible values are 1, 2, 3, or 4.
SCSI element ID of the destination location. Applies only to drives and media slots in SCSI partitions or libraries. See the applicable library User's Guide for details on how SCSI IDs are assigned.
A value of "-1" indicates the location is not a SCSI slot. For example, it may be in a SL8500 library, an HLI partition in a SL3000 library, or a slot not allocated to a partition in a partitioned library.
Total dismounts for this media
Note:
This field links to the Exchanges Overview screen, which lists this media's exchanges. See "Exchanges Overview Screen".Date and time when the media was last ejected from the library through a CAP
Date and time when the media was last entered into the library through a CAP
Percentage of the media's expected useful life that has elapsed
Status of the media upon completion of the exchange, as derived from a variety of factors, including media errors, write efficiency, and read margin. Possible values:
CART_MEM_FAILURE – An error has occurred with the cartridge memory; this results in reduced performance.
CLEAN_REQ – The drive is due for cleaning.
DRIVE_ERROR – The drive has experienced a hardware or microcode error.
ENCRYPT_ERROR – An error has occurred with the encryption key management system. This is neither a drive nor media problem, so there is no effect on the suspicion of the drive or media.
Possible causes for this status include the following: compromised network connectivity to the encryption key server; the encryption key server is down; the drive key enrollment has expired and the drive must be re-enrolled; either the drive or the media is not encryption-capable. It may be possible for the drive to read unencrypted media until the encryption issue is resolved.
EXPIRED_CLEAN_TAPE – The cleaning media has expired.
FAILED_MOUNT
FATAL_ERROR – The media cannot be mounted or is stuck. Possible reasons include a problem with the drive hardware or the media cartridge.
FW_DOWN_LEVEL – The drive firmware is downlevel.
GOOD – The exchange completed with no issues.
INCOMPLETE_UNLOAD – The application requested that the media be unloaded. The drive has detected data still in its buffer and has asked for confirmation from the application.
INVALID_OPERATION – The host has requested a an invalid operation, such as any of the following: mounting media in an incompatible drive; reading from media that is blank; writing on media that is write-protected; attempting to locate a position beyond the beginning or end of the tape.
LOAD_ERROR – An issue with the media prevented it from being loaded. Possible causes include: a problem with the drive hardware or microcode; a problem with the cartridge leader.
LTO_NON_ADI_MODE –ADI mode has not been enabled on either the library, the drive, or both.
MEDIA_ERROR – The media cannot be read or written. Possible causes include a problem with the tape medium or the MIR.
NON_DRV_ERROR – This is neither a drive nor media problem, so there is no effect on the suspicion of the drive or media. For additional information, check the following: for Enterprise drives, check the exchange fault symptom code (FSC); for LTO drives, check recent tape alerts.
Possible causes for this status are as follows:
* A Media Write Protect Tape Alert must be set. The host application is attempting to write to media that has been write protected.
* FSC has been set to 3627, 3629, 362A, or 362B. These FSC codes are set during a "normal operation," which checks that a piece of media is truly blank before labeling it. The host application will perform the following sequence: 1) mount new tape; 2) attempt to check for no label; 3) label the new tape.
OTHER_DRV_ERROR
OTHER_ERROR
PERM_ERROR – A permanent error occurred on the exchange. This may be the result of a media format error, possibly from a previous exchange.
READ_ERROR – The media could not be read. Possible causes include: a problem with the drive hardware or microcode; a problem with the media MIR; the media may have been corrupted during a previous mount; the drive and media may be incompatible
UNKNOWN – STA has not received enough exchange data from the library to calculate drive health. It may be that the drive is not supported (LTO 2, for example) or the library firmware is downlevel.
UNLOAD_ERROR – An error occurred during the unload operation. Possible causes include: a problem writing to the media RFID or MIR; the drive and media may be incompatible.
WRITE_ERROR – An error occurred during the write operation. Possible causes include: a problem with the drive hardware or microcode; the media may have been corrupted during a previous exchange; the drive and media may be incompatible.
Media health as computed by STA analytics. This value reflects a variety of factors, such as the media's error history, read margin, and write efficiency. It includes all data up to and including the last completed exchange and is updated immediately upon completion of the exchange.
Possible values, in order of degrading health:
USE – The media has had no failures or degradation in the last ten exchanges.
MONITOR – The media has had multiple errors; there is a less than 80 percent chance that it needs service.
EVALUATE – The media has had multiple errors; there is a greater than 80 percent chance that it needs service.
ACTION – The media has had an error that requires service.
UNKNOWN – STA has not received enough data to compute health for the media. This may be due to a variety of factors, including exchanges on unsupported drive models, drives with downlevel firmware, or LTO drives with ADI mode not enabled.
Note:
STA only receives information about errors detected by a drive while performing read/write activity to the media. STA does not receive information about errors that may occur in the data path or host applications.Trend of media health between the last two exchanges, as computed by STA analytics. Options are: BETTER, UNCHANGED, WORSE.
Host Library Interface (HLI) address of the location. Applies only to drives or media slots in HLI partitions or libraries. This address is assigned by the ACSLS or ELS host software.
Note:
Available only for SL8500 libraries with firmware FRS_7.80 or higher or SL3000 libraries with firmware FRS_4.0 or higher. For all others, the value is left blank.For media slots, format is l,p,w,c, where:
l =logical storage manager (LSM) number. Possible values are 0, 1, 2, or 3.
p =panel number.
r =row number.
c =column number.
For drives, format is l,p,t, where:
l =logical storage manager (LSM) number. Possible values are 0, 1, 2, or 3.
p =panel number
t =transport number
Length of the media, in meters
User-assigned name for the library. Assigned in the Settings – SNMP Connections screen.
Unique ID assigned to the library.
Library frame serial number
Note:
This field links to the Libraries – Overview screen, detail view, which displays all available details for this library. See "Libraries Overview Screen".Indicates whether the media has reached the end of its expected useful life. Possible values: EOL, GOOD, UNKNOWN.
Detailed media type as reported by the library. Examples include LtoGen5_1500GB, LtoGen6_2.5TB, T10000, T10000T2_Sport, and T10kUniv_Cleaning. UNKNOWN indicates media with a missing or unreadable external volume serial number (VSN or volser) label.
Date when the media was manufactured, in yyyymmdd format.
Note:
This date is converted from UTC time to the time zone specified in the user's Preferences settings.Media serial number assigned by the manufacturer.
Note:
STA does not have this information until the media has been mounted in a drive.Unused media capacity, in megabytes; this value is provided after the exchange completes. Available for StorageTek enterprise drives only.
Note:
Reported value varies by drive vendor and other factors.Unused media capacity, in megabytes; this value is provided before the beginning of the exchange. Available for LTO drives only.
Note:
Reported value varies by drive vendor and other factors.Maximum media capacity, in megabytes.
Note:
Reported value varies by drive vendor and other factors.Library internal address.
For SL150 libraries, the format is m,s,w,c (for example, 1,Left,1,2), where:
m =module number; 1–10, from top (base module) to bottom
s =side; Left or Right
w =row number; 1–3, from top to bottom
c =column number; 1–5, from front to back
For SL500 libraries, the format is l,m,r,c (for example, 0,2,2,3), where:
l =for nonpartitioned libraries, this is the library ID (always 0); for partitioned libraries, this is the partition ID (1–8).
m =module number; 1–5, from top to bottom of the rack
r =drive row number; 1–2 (Base Module) or 1–4 (Drive Expansion Module), from top to bottom of the module
c =column number; always 9 for drives
For SL3000 and SL8500 libraries, the format is l,r,c,s,w (for example, 1,1,2,2,3), where:
l =library number. For nonpartitioned libraries, this is the library ID; for partitioned libraries, this is the partition ID (1–8).
r =rail number. For SL3000 libraries, this value is always 1. For SL8500 libraries, possible values are 1, 2, 3, or 4.
c =column number.
s =side number.
w =row number.
Rail number. For SL150, SL500, and SL3000 libraries, this value is always 1. For SL8500 libraries, possible values are 1, 2, 3, or 4.
SCSI element ID of the slot where the media is located. Applies only to media slots in SCSI partitions or libraries. See the applicable library User's Guide for details on how SCSI IDs are assigned.
A value of "-1" indicates the media is not in a SCSI slot. For example, it may be in a SL8500 library, an HLI partition in a SL3000 library, or a slot not allocated to a partition in a partitioned library.
Total media slots activated through hardware activation.
Total media slots installed but not necessarily activated for use.
Total occupied media slots. This count includes both activated storage slots and system slots.
Although system slots are not intended for long-term storage of data media, they may temporarily contain data media in certain situations. Following are examples of situations in which media monitored by STA may reside in system slots. See your library User's Guide for complete details on the use of system slots.
Data media may be moved to system slots during a library diagnostic self-test.
Data media in transit at the time of a Redundant Electronics failover may be moved to system slots.
Cleaning media may be stored in system slots if a library is using automatic cleaning,
Note:
This attribute is updated only on completion of a library data collection. For example, if you enter media through a CAP, you may need to perform a manual data collection or wait for a scheduled collection to complete before this attribute reflects the new media count. See the STA User's Guide for details.Note:
This field links to the Media – Overview screen, list view, which lists all media for this library. See "Media Overview and Analysis Screens".Total media slots with no media. This count includes both activated storage slots and system slots.
Host Library Interface (HLI) address of the location. Applies only to drives or media slots in HLI partitions or libraries. This address is assigned by the ACSLS or ELS host software.
Note:
Available only for SL8500 libraries with firmware FRS_7.80 or higher or SL3000 libraries with firmware FRS_4.0 or higher. For all others, the value is left blank.For media slots, format is l,p,w,c, where:
l =logical storage manager (LSM) number. Possible values are 0, 1, 2, or 3.
p =panel number.
r =row number.
c =column number.
For drives, format is l,p,t, where:
l =logical storage manager (LSM) number. Possible values are 0, 1, 2, or 3.
p =panel number
t =transport number
Unique ID assigned to the library.
Library internal address.
For SL150 libraries, the format is m,s,w,c (for example, 1,Left,1,2), where:
m =module number; 1–10, from top (base module) to bottom
s =side; Left or Right
w =row number; 1–3, from top to bottom
c =column number; 1–5, from front to back
For SL500 libraries, the format is l,m,r,c (for example, 0,2,2,3), where:
l =for nonpartitioned libraries, this is the library ID (always 0); for partitioned libraries, this is the partition ID (1–8).
m =module number; 1–5, from top to bottom of the rack
r =drive row number; 1–2 (Base Module) or 1–4 (Drive Expansion Module), from top to bottom of the module
c =column number; always 9 for drives
For SL3000 and SL8500 libraries, the format is l,r,c,s,w (for example, 1,1,2,2,3), where:
l =library number. For nonpartitioned libraries, this is the library ID; for partitioned libraries, this is the partition ID (1–8).
r =rail number. For SL3000 libraries, this value is always 1. For SL8500 libraries, possible values are 1, 2, 3, or 4.
c =column number.
s =side number.
w =row number.
Rail number. For SL150, SL500, and SL3000 libraries, this value is always 1. For SL8500 libraries, possible values are 1, 2, 3, or 4.
SCSI element ID of the source location. Applies only to drives and media slots in SCSI partitions or libraries. See the applicable library User's Guide for details on how SCSI IDs are assigned.
A value of "-1" indicates the location is not a SCSI slot. For example, it may be in a SL8500 library, an HLI partition in a SL3000 library, or a slot not allocated to a partition in a partitioned library.
Date and time when STA first began tracking this volume serial number (VSN or volser). If the volser is used on more than one media, this field reflects the earliest start date available.
Date and time when STA stopped tracking this volume serial number (VSN or volser). This is when STA determined the volser no longer exists in any of the monitored libraries and updated the volser status from "missing" to "removed".
Calculated suspicion level for the media. Possible values: 0–100. Lower numbers are desirable. The higher the number, the higher the probability the media needs attention.
The Media Suspicion Level graph on the Media – Overview screen shows the daily system average media suspicion level, which is calculated daily at midnight, STA server time.
Media type short description. Examples include LTO4, LTO_CLNU, T10000T1, and T10000T2_CLN. UNKNOWN indicates media with a missing or unreadable external volume serial number (VSN or volser) label.
Note:
Type is UNKNOWN for all DLT and SDLT media, for which STA does not compute health.Write efficiency for all the data on the media, based on capacity over distance. Expressed as a percentage. Computed by comparing how many blocks it took to write the data compared to what it should take.
Available only if the drive firmware supports TTI 5.4.
This attribute is useful in selecting media to be used for drive calibration and qualification.
Total megabytes read and written by the drive between the two most recent cleanings.
Total megabytes read and written by the drive since its last cleaning.
Date and time when STA started tracking this resource (library, complex, drive, or media).
Total megabytes read or written by the drive during the mount
Average throughput rate for the drive, in megabytes per second. Calculated as:
total MB (read +written) /total seconds mount time
Note:
This value may be affected by a variety of factors external to the drive, such as robot speed or application behavior—for example, some applications do not dismount media immediately upon completion of read/write operations, causing the drive to be idle for much of the mount. As a result, this value is not likely to represent the drive's maximum potential throughput rate.Total megabytes read by the drive during the mount.
Note:
Some media transactions involve a very small amount of I/O. All values greater than 0.0 and less than 0.1 are displayed as 0.01. A value of 0.0 indicates no I/O.Average read rate for the drive, in megabytes per second. Calculated as:
total MB read /total seconds mount time
Note:
This value may be affected by a variety of factors external to the drive, such as robot speed or application behavior—for example, some applications do not dismount media immediately upon completion of read/write operations, causing the drive to be idle for much of the mount. As a result, this value is not likely to represent the drive's maximum potential read rate.Total uncompressed megabytes received by the application from the drive during the mount.
Total uncompressed megabytes sent from the application to the drive during the mount.
Total megabytes written by the drive during the mount
Average write rate for the drive, in megabytes per second. Calculated as:
total MB written /total seconds mount time
Note:
This value may be affected by a variety of factors external to the drive, such as robot speed or application behavior—for example, some applications do not dismount media immediately upon completion of read/write operations, causing the drive to be idle for much of the mount. As a result, this value is not likely to represent the drive's maximum potential write rate.Number of calibrations attempted on the drive during the most recent calibration or qualification cycle. A minimum of two attempts are required for a successful calibration or qualification. Possible values: 0, 1, 2, 3.
Current state of the media relating to drive calibration and qualification.
Applies only if the media is assigned to a validation drive as the primary or secondary calibration media. Options include: Assigned, Available, Calibrated, Not Suitable, Media in Calibration, Media in Qualification.
Serial number of the validation drive that was most recently calibrated or qualified with this media.
Drive type of the validation drive that was most recently calibrated or qualified with this media.
Information about the most recent calibration or qualification of the drive. Options include: Calibration in progress, Completed.
Data Quality Index (DQI) calculated during most recent drive calibration in which this media was used. DQI is a measure of the amount of error correction left on the media. A higher value is desirable.
Provided only for T10000T2 media assigned to the calibration media logical group and the validation drive firmware supports TTI 5.4.
Media Suspicion Level of the most recent drive calibration in which this media was used. Possible values: 0–100. Lower numbers are desirable. The higher the number, the higher the probability the media needs attention.
Provided only if the media has been assigned as the primary or secondary calibration media for a validation drive.
Data Quality Index (DQI) calculated during the most recent drive qualification in which this media was used. DQI is a measure of the amount of error correction left on the media. A higher value is desirable.
Provided only for T10000T2 media that has been assigned as the primary or secondary calibration media for a validation drive and the drive firmware supports TTI 5.4.
Name of the library complex in which the most recent drive calibration or qualification was performed using this media.
Model of the library in which the most recent drive calibration or qualification was performed using this media.
Serial number of the library complex in which the most recent drive calibration or qualification was performed using this media.
Total wraps of data present on the media. Calculated based on the Media Type and the MV Calibration MB Used.
Used to determine whether the media has enough data to be used for drive calibration and qualification.
Indicates the exchange was initiated by STA to fulfill one of the following processes:
A drive calibration
A drive qualification
A Basic Verify performed on calibration media that has no STA history
Drive suspicion level reported at the start of the most recent calibration of the drive. Possible values: 0–100. Lower numbers are desirable. The higher the number, the higher the probability the drive needs attention.
State of the most recent drive calibration or qualification performed on the drive. Options are:
For both drives and media – Calibrated, Not calibrated, Not Suitable, Offline, Drive Calibration Needs Media, Media Make History.
For drives only – Drive In Calibration 1, Drive In Calibration 2, Drive In Qualification 1, Drive In Qualification 2.
For media only – Media In Calibration, Media In Qualification.
Information about the current validation status of the media. Available only if the media has been assigned to the calibration media logical group.
Total validations performed on the media.
Number of days since the media was last validated based on the last validation time. Null if the media has not yet been validated.
Data Quality Index (DQI) computed by STA analytics based on the results of the media validation. DQI is a measure of the amount of error correction left on the media. This value is specific to the media and, by factoring out the drive's contribution, provides a more targeted measure of media quality than Read Quality Index (RQI).
Provided only for validations involving T10000T2 media and validation drives with firmware supporting TTI 5.4.
DQI is reported as a percentage, and a higher value is desirable. It is not computed in the following situations:
The validation is a Basic Verify.
The Media Type of the validated media is T10000T1.
The validation results in an media validation Perm Status of True.
The validation results in an Invalid MIR error.
Indicates the drive has been assigned to the media validation drive pool through SL Console.
Indicates the drive is currently available to perform media validation exchanges, as determined by STA analytics. If this attribute is blank, the drive does not meet minimum requirements for STA media validation.
Indicates STA can use this drive for validation activities. The drive has been assigned to a media validation drive pool through SL Console and has a Drive Type and Drive Firmware Version that support STA media validation.
Indicates the validation drive is currently in use by STA, another application, or diagnostics operations.
Date and time when the drive was most recently calibrated.
Indicates the validation drive is reserved by STA for use in a media validation.
Estimated time remaining on the media validation as reported by the drive. The value is updated periodically. Available only for in-progress validations.
Indicates the validation has not completed. The validation may be pending or in-process. Options are True or False.
Software application or device used to initiate the media validation activity. Options are: DRIVE, HOST, LIBRAY, SLC, STA.
The media validation operation could not begin or has been interrupted. See the "MV Status Information" and "MV Recommendation" attributes for additional information.
Options are True or False. A True status may occur in the following situations:
The validation was interrupted by a host request for the media or manually canceled while in process.
The validation could not begin. Possible reasons include: the drive and media types do not match; the media is encrypted, but the validation drive is not encryption capable; the drive has timed out because of a network or other system error.
You may need to restart or resume the media validation request depending on the situation.
Start date and time of the most recent media validation. For Drives – Overview, this is the most recent validation performed by the drive. For Media – Overview, this is the most recent validation performed on the media.
Date and time when the media was last used for drive calibration.
Available only if the media has been assigned to the calibration media logical group.
Data Quality Index reported upon completion of the most recent drive calibration. DQI is a measure of the amount of error correction left on the media. A higher value is desirable.
Provided only for validations involving T10000T2 media and validation drives with firmware supporting TTI 5.4.
Start date and time of the most recent qualification of the drive.
Recommended user action for the most recently completed media validation. Determined by STA analytics, based on the results of the validation. Examples include: "Media OK: Continue using"; "Corrupted MIR: Rebuild MIR and Re-run Media Validation"; "Migrate the data and scratch the tape".
Exchange Recording Technique used by the drive during the most recent calibration or qualification performed with this media.
Date and time when the status of this media validation was last updated.Updated whenever there is a change to the MV Request State.
Type of verification test performed during the most recent validation on this media.
Library event code for a library error that occurred during the media validation. A value indicates an operational issue with the media validation that prevented the test from completing; it does not imply there are issues with the media itself.
You can display the library event codes through the SL Console; see the SL8500 User's Guide for details.
Total amount of data that has been written to the media as determined by the drive during drive calibration.
Used with the Media Type to calculate the MV Calibration Number of Wraps for the media.
User-defined name assigned to the media validation policy.
Date the media was no longer eligible for use in calibration. Possible reasons are as follows; see the STA User's Guide for additional details about calibration media qualifications.
The media was removed from the calibration media logical group.
The media has been disqualified from calibration.
New data has been written to the media, invalidating any prior calibration information.
The media was removed from the tape library system.
Date the media was added to the calibration media logical group.
Indicates this media is assigned to a validation drive as the primary calibration media. Possible values: True or False (blank).
For primary calibration media, this attribute is True and the MV Calibration Drive SN attribute indicates the drive it is assigned to.
For secondary calibration media, this attribute is False and the MV Calibration Drive SN attribute indicates the drive it is assigned to.
For media not used for drive calibration, this attribute is False and there is no MV Calibration Drive SN entry.
Start date and time of the most recent qualification of the drive using the primary calibration media.
Order in which media validation requests are processed in the queue. Applies only to pending and in-process requests. This value is blank for completed validations.
Recommended user action determined by STA analytics based on the results of the media validation. Provided only for completed validations. Examples include: "Media OK: Continue using"; "Corrupted MIR: Rebuild MIR and Re-run Media Validation"; "Migrate the data and scratch the tape".
Date and time when the media validation request was placed in the MV queue. Depending on the source of the request, this is either the time the MV request was initiated by STA, or the time STA recognized the request initiated by another application.
Status of the media validation request. Examples are: Completed, Error, In-Progress - Stop Requested, Interrupted, Pending, Starting, Unknown.
See "MV Interrupted", "MV Recommendation", "MV Status Information" for additional information about validations with issues.
Final result of the media validation as determined by STA analytics upon successful completion of the verification test. This attribute applies to the quality of the data on the media.
Options are: DEGRADED, FAILED, USE, UNKNOWN. The value is UNKNOWN if the validation was interrupted or did not complete successfully.
Start date and time of the most recent qualification of the drive using the secondary calibration media.
Provides information about issues with the media validation request. The information may explain the problem or suggest corrective action to take. This attribute is usually blank. Examples include: "Waiting for drive; all drives in use." and "Incompatible tape format for drive."
A value of "Drive Timeout; MDV manager cancel" indicates STA requested the library to return the media to a media slot because the validation took more than nine hours to complete. This is usually the result of a library operational error. If the Read Percentage attribute for the validation exchange is less than 100 percent, then the validation did not complete. If this status recurs for the media, there is probably an issue with the media; if it recurs for the drive, there is probably an issue with the drive.
Percentage of the verification test that has been completed during this media validation. The value is updated periodically for in-progress validations.
A value of 100 indicates the test completed successfully. If the test was interrupted, the value remains less than 100.
Indicates the type of verification test performed during the media validation. Examples are: Basic Verify, Cancel Validation, Complete Verify Plus, Standard Verify, Verify and Rebuild MIR.
Total time the media validation has taken, as reported by the drive. The time starts when the validation test begins on the drive and ends when the test is complete. For in-progress validations, the value is updated periodically. For pending validation requests, the value is null.
Unique name assigned to the partition by STA. Includes the library-assigned partition number. Formatted as: Library Complex Name:Partition Type:Partition Number
Unique partition ID assigned on the library. For nonpartitioned libraries, the value is always "0". For partitioned libraries, possible values are 1–8.
Type of host-partition connection. Possible values:
HLI – HLI (Host Library Interface) protocol
OTHER – System cells, used for storage of diagnostic media.
SCSI – SCSI protocol
Total number of user-defined partitions in the complex or library. The maximum number of partitions per library is eight, and per complex, it is 16.
This count does not include the following:
System partitions—for storage of cleaning and diagnostic media.
Empty partitions—partitions with no storage slots, drive bays, or CAPs. SL Console allows you to create empty partitions to reserve the partition number for later use.
Partitions for SL8500 complexes can extend across libraries. In such cases, the libraries in the same complex must all have the same partition count. For example, complex SL8500_1 includes 10 libraries and 4 partitions. On the Complexes Overview screen, the Partitions value for complex SL8500_1 is "4," and on the Libraries Overview screen, the Partition count for each of the 10 libraries in the complex is also "4."
Number of permanent read errors
Number of permanent write errors
Indicates the exchange resulted in a permanent error. Available only if the drive firmware supports TTI 5.4. Options are True or False.
This status could be the result of an operational error, a bad drive, or bad media. For media validation exchanges, in most cases when this value is True, the MV Result is Unknown.
Connection speed of Drive Port A as reported by the library. Possible values are as follows:
A specific value (for example, FC-8Gb or SAS-3Gb)—Indicates the port has been initialized and the speed has been assigned.
Auto—Indicates the speed is auto-negotiated between the drive and the switch.
Unknown—Indicates the library does not have enough information, possibly because the port is not configured or does not exist.
Null—Indicates the port does not exist. For example, if the drive has only one port, the value for Port B is null.
Connection speed of Drive Port B as reported by the library. Possible values are as follows:
A specific value (for example, FC-8Gb or SAS-3Gb)—Indicates the port has been initialized and the speed has been assigned.
Auto—Indicates the speed is auto-negotiated between the drive and the switch.
Unknown—Indicates the library does not have enough information, possibly because the port is not configured or does not exist.
Null—Indicates the port does not exist. For example, if the drive has only one port, the value for Port B is null.
Device property being changed.
Unique identifier of the pass-through port (PTP). Applies to SL8500 libraries only.
Total alerts generated for this PTP, based on defined STA alert policies
Note:
This field links to the Alerts Overview screen, list view, which lists alerts for this PTP. See "Alerts Screens".Total pass-through ports (PTPs). Applies to SL8500 libraries only.
Total media ejected through all pass-through ports (PTPs) over the last 30 days. Applies to SL8500 libraries only; all other libraries show 0.
Total media entered through all pass-through ports (PTPs) over the last 30 days. Applies to SL8500 libraries only; all other libraries show 0.
Unique identifier for the pass-through port (PTP)
Library internal address of the pass-through port (PTP). Applies to SL8500 libraries only.The format is l,r,c,s,w (for example, 1,1,-6,1,0), where:
l =library number. For nonpartitioned libraries, this is the library ID; for partitioned libraries, this is the partition ID (1–8).
r =rail number. For SL8500 libraries, possible values are 1, 2, 3, or 4.
c =column number. For PTPs, this value is always -6.
s =side number. For PTPs, this value is always 1.
w =row number. For PTPs, this value is always 0.
Current state of the pass-through port (PTP) power LED. Normal condition is ON. Options are: ON, OFF, or UNKNOWN.
Total pass-through port (PTP) messages received from the library. A sudden increase in this number indicates a condition that should be investigated.
Current pass-through port (PTP) state, as reported by the library. Applies to SL8500 libraries only. Examples are: READY. STA updates this value hourly and as SNMP traps for the PTP are received from the library.
Throughput rate for the time spent actively reading and writing; idle time is excluded. Expressed in megabytes per second. Available for StorageTek enterprise drives only.
Calculated as:
(compressed MB read +compressed MB written) /(read time +write time)
Ratio of read and write time to total mount time. Displayed as a percentage. A value close to 1.0 indicates the drive is active over the entire mount. Available for StorageTek enterprise drives only.
Calculated as:
(read time +write time) /total mount time
Amount of error correction code (ECC) read margin remaining on the media, as reported by the drive during the last mount. Reported as a percentage. A high value is desirable. Available only for StorageTek T10000C and T10000D drives.
If STA determines that this value has gone below a threshold for this drive type, the Exchange Read Marginal attribute is set to True.
Read rate for the time spent actively reading; idle time is excluded. Expressed in megabytes per second. Available for StorageTek enterprise drives only.
Calculated as:
compressed MB read /total read time
Ratio of read time to total mount time. Calculated as:
read time /total mount time
Date and time when the STA server received the SNMP trap from the library.
Date and time when the exchange started.
Total times the media was repositioned for any reason
Total times the media was repositioned due to non-ERP (error recovery process) reasons, such as data overrun or underrun.
Unique ID for the SNMP request.
Device result code for the event.
Serial number of the robot
Total alerts generated for this robot, based on defined STA alert policies
Note:
This field links to the Alerts Overview screen, list view, which lists alerts for this robot. See "Alerts Screens".Total number of robots
Total robot get retries
Total robot media get actions
Current health of the robot as calculated by STA. Options are: ACTION, ERROR, EVALUATE, MONITOR, USE, UNKNOWN.
Note:
This attribute is not to be confused with the robot status reported by the library; see "Last Robot Message" for comparison.Note:
This attribute is updated only on completion of a library data collection. Regular data collections are done automatically, or you may initiate a manual data collection at any time. See the STA User's Guide for details.Unique identifier for the robot
Library internal address.
For SL150 libraries, the format is m,s,w,c (for example, 1,Left,1,2), where:
m =module number; 1–10, from top (base module) to bottom
s =side; Left or Right
w =row number; 1–3, from top to bottom
c =column number; 1–5, from front to back
For SL500 libraries, the format is l,m,r,c (for example, 0,2,2,3), where:
l =for nonpartitioned libraries, this is the library ID (always 0); for partitioned libraries, this is the partition ID (1–8).
m =module number; 1–5, from top to bottom of the rack
r =drive row number; 1–2 (Base Module) or 1–4 (Drive Expansion Module), from top to bottom of the module
c =column number; always 9 for drives
For SL3000 and SL8500 libraries, the format is l,r,c,s,w (for example, 1,1,2,2,3), where:
l =library number. For nonpartitioned libraries, this is the library ID; for partitioned libraries, this is the partition ID (1–8).
r =rail number. For SL3000 libraries, this value is always 1. For SL8500 libraries, possible values are 1, 2, 3, or 4.
c =column number.
s =side number.
w =row number.
Current state of the robot power LED. Normal condition is ON. Options are: ON, OFF, or UNKNOWN.
Total robot media put retries
Total robot media put actions
Total robot messages received from the library. A sudden increase in this number indicates a condition that should be investigated.
Current robot state, as reported by the library. Options are: EMPTY, ERROR, INOPERATIVE, NOT POWERED, or READY. STA updates this value hourly. Additionally for SL3000 and SL8500 libraries, the value is updated as SNMP traps for the robot are received from the library.
Measure of how much error correction is left on the media, as calculated from the last exchange or media validation. This value is specific to the exchange, with contributions from both the drive and the media. In comparison, the Data Quality Index (DQI) is a more targeted measure of media quality because STA factors out the drive's contribution.
RQI is reported as a percentage. A high value is desirable.
Severity of the event.
Number of permanent servo errors
Type of SNMP trap. Options are:
CAP
Drive
Heartbeat
Library Environment Check
Library Log
Library Status
PTP
SNMP Agent Start
For Drives Overview: Date and time when STA first began tracking this drive serial number.
For Media Overview: Date and time when STA first began tracking this volume serial number (VSN or volser). If the volser is used on more than one media, this field reflects the earliest start date available.
For Drives Overview: Date and time when STA stopped tracking this drive serial number. This is when STA determined the drive serial number no longer exists in any of the monitored libraries and updated the drive status from "missing" to "removed".
For Media Overview: Date and time when STA stopped tracking this volume serial number (VSN or volser). This is when STA determined the volser no longer exists in any of the monitored libraries and updated the volser status from "missing" to "removed".
Indicates the media meets the minimum requirements for STA analytics. Possible values: True or False. The following media types usually have a value of True.
StorageTek T10000T1 and higher
StorageTek 9840
LTO-3 and higher
STA tracks media for which this value is False, but it is not able to perform full analytics on them because it receives only minimal data about them.
See the STA Requirements Guide for details about supported media.
Additional text regarding the event, sent by the subsystem.
Manufacturer's recommended usage limit for the cleaning media.
Note:
Not available for all media and drive types. This value may show as "0" or blank, which should be interpreted as not available or unknown.Total time during this exchange that the drive has tension on the media. Does not include the time required to thread the media.
Total time the drive spent reading and writing data during the exchange
Total time the drive spent reading data during the exchange
Total time the drive spent writing data during the exchange
Total host requests received by this library or complex.
Entity type to which the trap pertains. One of the following:
CAP – CAP, AEM, or mailslot status
Drive – Drive status
Heartbeat
Library Environment Check
Library Log
Library Status
Number of permanent unload errors
Number of unknown usage errors
STA username associated with the event.
Volume serial number (VSN or volser) assigned to the media by its external label. If the library does not supply the volser, STA provides one composed of Library Serial Number:Physical Address.
Note:
This field links to the Media – Overview screen, detail view, which displays all available detail for this media. See "Media Overview and Analysis Screens".Indicates whether the media uses StorageTek VolSafe technology. STA does not know the status until the media has been mounted. Possible values: Yes or No. Blank indicates unknown.
Write efficiency for the exchange, based on capacity over distance. Reported as a percentage. A high value is desirable. Available only for StorageTek T10000C and T10000D drives.
If STA determines that this value has gone below a threshold for this drive type, the Exchange Write Inefficient attribute is set to True.
The Exchange Write Efficiency graph on the Drives – Overview and Media – Overview screens shows a system average over time for all drives. Because not all drive types report write efficiency, the system average may vary significantly over time, depending on which drives had exchange activity during the reported period. If there are no exchanges for T10000C and T10000D drives on a given date, the value is set to zero for that day.
Write rate for the time spent actively writing; idle time is excluded. Expressed in megabytes per second. Calculated as:
compressed MB written /total write time
Ratio of write time to total mount time. Calculated as:
write time /total mount time