Attribute

Definition

Exchange Start

Date and time when the drive was reserved for the exchange or cleaning operation.

Note – This field links to the Libraries – Exchanges screen, detail view, which displays all available detail for this exchange. See “Exchanges Screen”.

Exchange End

Date and time when the exchange completed

Exchange Elapsed Time

Total time the drive was reserved for the exchange. Starts at the beginning of the mount move and ends at the completion of the dismount move. Includes total mount time plus total transit time immediately before and after the mount. Displayed in hh:mm:ss format.

Exchange Mount Time

Total time the media was 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.

Drive Exchange Status

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:

Media Exchange Status

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:

Mount Read MB/sec

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.

Mount Write MB/sec

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.

Mount R/W MB/sec

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.

Mount Read MB

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.

Mount Write MB

Total megabytes written by the drive during the mount

Mount R/W MB

Total megabytes read or written by the drive during the mount

Mount Sent MB

Total uncompressed megabytes sent from the application to the drive during the mount.

Mount Received MB

Total uncompressed megabytes received by the application from the drive during the mount.

Drive Write Warning

The drive could not write to the media. The drive or media may need to be replaced.

Exchange Drive Cleaning Required

Indicates whether the drive needed cleaning at the time of the exchange. Possible values: Yes or No.

Note – Additional detail may be available via the Clean Periodic Alert and Clean Now Alert attributes.

Current Cleaning Uses

Total number of times the cleaning media has been mounted in a drive since STA began monitoring the media.

Read Warning Alert

The drive has experienced severe trouble reading.

Hard Error Alert

Indicates an unrecoverable read, write, or positioning error. This alert is cleared internally when the media is ejected.

Media Error Alert

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.

Media Life Alert

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.

Clean Periodic Alert

A clean threshold has been exceeded. Set when a StorageTek enterprise or IBM LTO drive detects that it needs routine cleaning.

Clean Now Alert

A media error has caused a cleaning request.

Drive Temperature Alert

The drive has experienced a cooling problem.

Drive Predictive Failure Alert

The drive firmware has predicted a drive hardware failure.

Drive Lost Statistics

Statistics stored on the media have been lost at some time in the past.

Tape Directory Invalid at Unload

The media directory has been corrupted. No data was lost, but media performance could be impacted.

Tape System Area Write Failure Alert

The system area on the media could not be written to at unload. No data was lost, but media performance could be impacted.

Tape System Area Read Failure Alert

The system area on the media could not be read from at load time. No data was lost, but media performance could be impacted.

Loading Failure Alert

The drive was unable to load the media and thread the tape.

Drive FW Failure Alert

The drive has detected a firmware fault. This alert remains active until all dumps are retrieved from the drive.

Cleaning Media Expired

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.

Cart Memory Failure

Indicates the cartridge memory failed during the exchange.