z/VM: CP Commands and Utilities Reference - z/VM - IBM

QUERY CACHE
QUERY CACHE
►►
Query
Authorization
Purpose
Operands
CACHE
Usage Notes
Responses
▼
rdev
rdev1-rdev2
Privilege Class: B
Use QUERY CACHE to display caching status for all storage subsystems that
support caching.
rdev
rdev1-rdev2
is the real device number of one of the devices in the subsystem, a range of
real device numbers, or any combination thereof.
1. When the cache is queried for a range of devices or a list of devices attached to
a 3990 Models 3 or 6 storage control and the devices in the range or list are
attached to the same storage control, only one subsystem response is issued
for each storage control.
For example, to display the caching status for the cache associated with device
340, enter:
query cache 340
2. Caching for RAID (Redundant Array of Independent Disks) technology DASD
such as the Enterprise Storage Server
(supported under z/VM in 3990
emulation mode) is always available. It cannot be modified by the user.
3. Error message HCP296E appears if the subsystem is not in the correct mode to
accept the QUERY CACHE command.
4. This command may be issued to offline devices.
Response 1:
rdev CACHE {available for subsystem}
{activation for subsystem in progress}
{unavailable for subsystem}
[- destage is in progress ]
[- destage has failed. Data is pinned.]
[- subsystem error ]
ccccccccK Bytes configured
aaaaaaaaK Bytes available
ooooooooK Bytes offline
ppppppppK Bytes pinned
696 z/VM: CP Commands and Utilities Reference
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