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

DELETE CU / CNTLUNIT
Responses
Messages
configuration in the hardware system area (HSA). You should also change the
other part of the hardware’s view: the active I/O configuration data set (IOCDS)
file on the support element (SE) hard disk.
To change the IOCDS file on the SE hard disk, you must:
a. Update the IOCP source file.
b. Run the IOCP utility (see page 1849) against the updated IOCP file. If the
IOCP utility runs without errors, it downloads the new IOCDS file to the SE
hard disk.
c. Issue the SET IOCDS_ACTIVE command (see page 1258) to make the new
IOCDS file the active file that the processor will use during the next
power-on reset (POR).
4. For more information about deleting control units from your I/O configuration
during initialization, see z/VM: I/O Configuration.
5. To define a new control unit on the system, use the DEFINE CU or CNTLUNIT
command. (See page 149.)
6. To change the definition of an existing control unit on the system, use the
MODIFY CU command. (See page 604.)
Response 1:
To delete control unit 300 from the I/O configuration, enter the following:
delete cu 300
Control unit configuration change completed successfully
Ready;
Response 2:
To delete control unit 43 from the I/O configuration when it is currently defined only
in channel-subsystem image 3, enter the following:
delete cu 43 css 3
Control unit configuration change completed successfully
Ready;
HCP1006E Command processing cannot complete
because the system does not support
the logical-channel-subsystem facility.
HCP6805E Cannot find RDEV for TYPE 1
subchannel
HCP6806E Dynamic I/O change request [for
channel path|for control unit|for
device] failed with return code nnnn
HCP6809E This processor does not support
dynamic I/O changes
HCP6815E Command failed in the channel
subsystem
222 z/VM: CP Commands and Utilities Reference
HCP6816E Dynamic I/O changes are not allowed
{on this system|for CSS nn}
HCP6819E A dynamic I/O command is currently
executing for user userid