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

SET RDEVICE DASD
Usage Notes
Examples
Responses
Messages
OFF
(the default if the SHARED YES option is specified.) Tells CP to not cache
data on the real device in the minidisk cache.
DFLTOFF
tells CP to not cache data on the real device in the minidisk cache except
for minidisks for whom caching is specifically enabled via the MINIOPT
MDC directory statement or the SET MDCACHE MDISK ON command.
SENSed
tells CP to use the information returned from a sense ID request to determine
the characteristics of this DASD. If omitted, the default is SENSED.
NOTSENSed
tells CP not to use the information returned from a sense ID request to
determine the characteristics of this DASD.
1. Not all DASD types are eligible for caching in the minidisk cache. If you specify
MDC DFLTON or MDC DFLTOFF for a device that is not cache eligible, data on
that device will not be cached.
Example 1:
To specify a shared DASD with minidisk caching off at device number 0410, enter
the following SET RDEVICE command:
set rdevice 0410 type dasd shared yes
Example 2:
HCP002E Invalid operand - operand
To define a non-shared DASD at device number 500 with minidisk caching enabled
on a device only for those minidisks that have specifically enabled caching, use the
following SET RDEVICE command:
set rdevice 500 type dasd mdc dfltoff
After CP has issued a message for each device address affected by a SET
RDEVICE command, the following summary response is displayed:
xxx RDEV(s) specified; yyy RDEV(s) changed; zzz RDEV(s) created
HCP003E Invalid option - command contains
extra option(s) starting with option
HCP6000E The range of device numbers cannot
exceed 256.
HCP6704E Missing token at end of line
HCP6706E Invalid address range - range
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