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

SET CACHE
the appropriate command response cannot be generated. Under these
circumstances, command processing is ended after generating the following
response:
Command results lost: SET CACHE SUBSYSTEM ON rdev.
In this case, the QUERY CACHE command can be issued to determine the state of
the cache.
If errors occur during the asynchronous processing of the command preventing the
successful completion of the command, the following response is displayed:
Command failed: SET CACHE SUBSYSTEM ON rdev.
rdev
is the real device number of a specified device for which the subsystem cache
has been made available.
Response to System Operator If the originator of the command is not the system
operator, the following response is issued to the system operator when the
subsystem cache has been made available. This response is also repeated for
each unique subsystem identified by the devices specified on the command line.
rdev CACHE was made available for subsystem by userid.
rdev
is the real device number of one of the specified devices in a subsystem for
which the cache has been made available.
userid
is the ID of the user who issued the command.
Response 4:
Immediate Response If you enter SET CACHE SUBSYSTEM FORCEOFF, or if the
cache is made unavailable immediately when you enter SET CACHE SUBSYSTEM
OFF, the following response is repeated for each unique subsystem that is
associated with the devices specified.
rdev CACHE unavailable for subsystem
rdev
is the real device number of a specified device for which the subsystem cache
has been made unavailable.
Delayed Response If the cache is not made unavailable immediately, the following
response is displayed when you enter SET CACHE SUBSYSTEM OFF:
Command started: SET CACHE SUBSYSTEM OFF rdev.
When the cache is made unavailable, the following responses are issued:
rdev CACHE unavailable for subsystem
1198 z/VM: CP Commands and Utilities Reference
Under certain circumstances, it is possible that a cache storage subsystem does
not notify CP when it has completed making the cache unavailable. When this
occurs, the appropriate command response cannot be generated. Under these
circumstances, command processing ends after generating the following response:
Command results lost: SET CACHE SUBSYSTEM OFF rdev.
In this case, the QUERY CACHE command can be issued to determine the state of
the cache.