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 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.

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.

Exchange Recording Technique

Recording method used by the drive during the exchange.

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:

Data Compression Ratio

Compression ratio for the exchange. Displayed as a ratio of total compressed data read or written by the drive, to total uncompressed data sent or received by the drive.

Drive Load Limit Alert

Indicates whether the drive exceeded its lifetime limit of media loads at the time of the exchange. Possible values: Yes or No.

Exchange Drive Suspicion

Calculated suspicion level for the drive. The higher the number, the higher the probability that this drive needs attention.

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.

MB Between 2 Most Recent Cleans

Total megabytes read and written by the drive between the two most recent cleanings.

MB since Last Clean

Total megabytes read and written by the drive since its last cleaning.

Drive Lifetime Cleans

Total cleans performed on the drive over its lifetime.

Note – The drive lifetime may be longer than the time it has been monitored by STA.

Drive Lifetime Loads

Total media loads for the drive over its lifetime. Available for all drive types but LTO3.

Note – The drive lifetime may be longer than the amount of time it has been monitored by STA.

Drive Lifetime Meters

Total meters of tape that have passed through the drive heads over the drive's lifetime. Available for all drive types but LTO3.

Note – The drive lifetime may be longer than the amount of time it has been monitored by STA.

Drive Lifetime Power Hours

Total hours the drive has been powered on over its lifetime.

Note – The drive lifetime may be longer than the amount of time it has been monitored by STA.