User`s guide

• v—Offline, No Volume Mounted. The device does not contain media.
• x—Online to other controller. Not available for use by this controller.
• A space in this column indicates the availability is unknown.
The spindle state is indicated using the following characters:
• ^—For disks, this symbol indicates the device is at speed. For tapes, it
indicates the tape is loaded.
• >—For disks, this symbol indicates the device is spinning up. For tapes,
it indicates the tape is loading.
• <—For disks, this symbol indicates the device is spinning down. For
tapes, it indicates the tape is unloading.
• v—For disks, this symbol indicates the device is stopped. For tapes, it
indicates the tape is unloaded.
• For other types of devices, this column is left blank.
For disks and tapes, a w in the write protect column indicates the unit is
write protected. This column is left blank for other device types.
The data caching state is indicated using the following letters:
• b—Both read caching and write-back caching are enabled.
• r—Read caching is enabled.
• w—Write-back caching is enabled.
• A space in this column indicates caching is disabled.
KB/S—This column indicates the average amount of kilobytes of data
transferred to and from the unit in the previous screen update interval. This
data is only available for disk and tape units.
Rd%—This column indicates what percentage of data transferred between
the host and the unit were read from the unit. This data is only contained in
the DEFAULT display for disk and tape device types.
Wr%—This column indicates what percentage of data transferred between
the host and the unit were written to the unit. This data is only contained in
the DEFAULT display for disk and tape device types.
Cm%—This column indicates what percentage of data transferred between
the host and the unit were compared. A compare operation may be
accompanied by either a read or a write operation, so this column is not
cumulative with read percentage and write percentage columns. This data is
only contained in the DEFAULT display for disk and tape device types.
HT%—This column indicates the cache hit percentage for data transferred
between the host and the unit.
PH%—This column indicates the partial cache hit percentage for data
transferred between the host and the unit.
MS%—This column indicates the cache miss percentage for data transferred
between the host and the unit.
Purge—This column shows the number of blocks purged from the write back
cache in the last update interval.
7–48 Diagnostics and Utilities