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

DISABLE HCD
Responses
Note that once HCM and HCD are disabled, there is no way to re-enable them
without re-IMLing your machine (thereby taking down all logical partitions if the
machine is logically partitioned).
2. If HCM and HCD are currently disabled for hardware dynamic-I/O-configuration,
this command does not attempt to establish a VM configuration token in the
machine. No attempt is made to change the token (which would allow the use of
the CP-dynamic-I/O-configuration commands) because “ownership” of the
existing configuration token is uncertain and it is not known whether HCM and
HCD were ever used to dynamically change the machine configuration. In this
case, whether FORCE or NOFORCE is specified, the command is executed
and HCM and HCD are disabled. Even though the machine I/O configuration
cannot be changed by any means in this case without a re-IML of your
machine,, there is still the capability to dynamically change the software I/O
configuration using CP operator commands.
3. If HCM and HCD are currently enabled for hardware dynamic-I/O-configuration
when this command is issued and the configuration token is successfully
changed to a VM configuration token, the SET DYNamic_i/o ON command can
be issued to enable the use of the CP dynamic-I/O-configuration commands.
Response 1:
When the DISAble HCD command is issued and the VM/HCD service virtual
machine does not exist or is not being used to control the I/O configuration, the
following response will be issued:
disable hcd
HCD is not active
Ready;
Response 2:
When the DISAble HCD command is issued and the VM/HCD service virtual
machine is enabled for hardware I/O-configuration changes, the following response
is issued when the configuration token is successfully changed to a VM token in the
machine:
disable hcd force
HCD was successfully disabled
Ready;
Response 3:
When the DISAble HCD command is issued and the VM/HCD service virtual
machine is not enabled for hardware I/O-configuration changes, the following
informational-message and command-response combination is issued:
disable hcd
HCPCCY654302I HCD is now disabled, but a VM configuration token
HCPCCY654302I was not established because HCD was not enabled for
HCPCCY654302I dynamic hardware changes.
Command complete.
Ready;
Response 4:
272 z/VM: CP Commands and Utilities Reference
When the DISAble HCD FORCE command is issued and the VM/HCD service
virtual machine is enabled for hardware I/O-configuration changes, the following