Enterprise Specific Information

Information specific to the StorageTek enterprise drive involved in the exchange. Appears only if the exchange involved an enterprise drive.


Attribute	Definition
Media MB Capacity	Maximum media capacity, in megabytes. Note – Reported value varies by drive vendor and other factors.
Media MB Avail Post	Unused media capacity, in megabytes; this value is provided after the exchange completes. Note – Reported value varies by drive vendor and other factors.
Write Efficiency	Write efficiency for the exchange, based on capacity over distance.
Read Margin	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. If STA determines that this value has gone below a threshold for this drive type, the Exchange Read Marginal attribute is set to Yes.
Time Spent Loaded	Total time during this exchange that the drive has tension on the media. Does not include the time required to thread the media.
Time Spent Reading	Total time the drive spent reading data during the exchange
Time Spent Writing	Total time the drive spent writing data during the exchange
Time Spent Reading or Writing	Total time the drive spent reading and writing data during the exchange
Read MB/sec	Read rate for the time spent actively reading; idle time is excluded. Expressed in megabytes per second. Calculated as: compressed MB read / total read time
Write MB/sec	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
R/W MB/sec	Throughput rate for the time spent actively reading and writing; idle time is excluded. Expressed in megabytes per second. Calculated as: (compressed MB read + compressed MB written) / (read time + write time)
Read Mount Ratio	Ratio of read time to total mount time. Calculated as: read time / total mount time
Write Mount Ratio	Ratio of write time to total mount time. Calculated as: write time / total mount time
R/W Mount Ratio	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. Calculated as: (read time + write time) / total mount time
Drive Media Maintenance Alert	Media in the drive requires physical maintenance, which must be corrected before the cartridge can be loaded successfully. For example, the leader may be pulled into the cartridge.
Repositioning cycles	Total times the media was repositioned for any reason
Repositioning cycles non ERP	Total times the media was repositioned due to non-ERP (error recovery process) reasons, such as data overrun or underrun.
Media at End of Warranty Alert	Media has reached the end of its warranty period and further use is not covered by warranty.