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

COMMIT
►►
COMMIT
Authorization
Purpose
Operands
Usage Notes
Responses
DEVICE
▼ rdev
rdev1-rdev2
Privilege Class: B
Use COMMIT to cause any cache fast write data to be transferred from the cache
to the addressed device. This command is valid for cache storage subsystems that
support the cache fast write function.
DEVICE
emphasizes that only data for the specified devices is to be committed (for
example, written to DASD). This is the default value.
rdev
rdev1-rdev2
is the real device number, a list of real device numbers, or a range of real
device numbers, of the devices to which the commit order is to be sent.
1. This command may produce delayed responses. For more information, see
“Delayed Responses to CP Commands” on page 8.
2. The COMMIT command is only valid for cache storage subsystems that support
the cache fast write function. An error message is generated if the subsystem
containing the specified device does not support this function.
Response 1:
Immediate Response: If the transfer of cache fast write data occurs immediately,
the following response is issued to the originator of the command. This response is
repeated for each device specified on the command line.
rdev Cache fast write data has been committed.
rdev
is the real device number of a device for which cache fast write data has been
transferred to the backing storage device.
Delayed Response: If the transfer of cache fast write data does not occur
immediately, the following response is issued:
Command started: COMMIT rdev.
COMMIT
When the transfer of cache fast write data completes, the following responses are
issued:
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Chapter 2. CP Commands 71