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

SET DASDFW
Messages
Under certain circumstances, it is possible that a cache storage subsystem does
not notify CP when it has deactivated the DASD fast write function. When this
occurs, the appropriate command response cannot be generated. Under these
circumstances, command processing is ended after generating the following
response:
Command results lost: SET DASDFW OFF rdev.
In this case the QUERY DASDFW command can be issued to determine the state
of the DASD fast write function.
If errors occur during the asynchronous processing of the command that prevent
the successful completion of the command, the following response is displayed:
Command failed: SET DASDFW OFF rdev.
rdev
is the real device number of a device for which the DASD fast write function
failed to deactivate.
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 DASD
fast write function has been deactivated. This response is also repeated for each
device specified on the command line.
rdev DASD fast write function was deactivated by userid.
rdev
is the real device number of a device for which the DASD fast write function
has been deactivated.
userid
is the ID of the user who issued the command.
HCP006E Invalid device type - {rdev|vdev|ldev}
HCP009E Invalid range - range
HCP021E A real device number was not supplied
or it is invalid.
HCP026E Operand missing or invalid
HCP040E Device {rdev|vdev|ldev} does not exist
HCP046E type rdev offline
HCP319E Error processing subsystem command
- cmd for DASD rdev
HCP332E Invalid control unit type - rdev
HCP1109E The command command cannot be
processed for device rdev because the
device is the secondary in a duplex
pair.
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