Attribute

Definition

Last Exchange Start

Date and time when the drive was reserved for the most recent exchange.

Note – This field links to the Libraries – Exchanges Overview screen, detail view, which displays all available details 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.

Recording Technique

Recording method used by the drive

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:

Media Suspicion Level

Calculated suspicion level for the media. The higher the number, the higher the probability that this media 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.

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.

Media Load Limit Alert

Indicates whether the media has exceeded the recommended number of drive loads

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.

Cart Memory Failure

Indicates the cartridge memory failed during the exchange.