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

SET DYNAMIC_I/O
►►
Set
Authorization
Purpose
Operands
Usage Notes
Responses
DYNamic_i/o
DYNamic_io
ON
OFF
Privilege Class: C
Use SET DYNAMIC_I/O or SET DYNAMIC_IO to enable or disable CP’s ability to
dynamically change the processor’s I/O configuration.
ON
tells CP to allow dynamic changes to the I/O configuration on this processor.
OFF
tells CP not to allow dynamic changes to the I/O configuration on this
processor.
1. You can also allow or prevent dynamic I/O changes to this processor’s I/O
configuration using the ENABLE or DISABLE DYNAMIC_I/O operands of the
FEATURES statement in the system configuration file. For more information
about the FEATURES statement, see the z/VM: CP Planning and Administration
book.
2. After you enable dynamic I/O changes for the system (using either this
command or the FEATURES statement), you can decide whether to allow
dynamic I/O changes on a device by device basis using the DYNAMIC_I/O
operand of the SET DEVICES command or the DEVICES statement in the
system configuration file. For more information about the SET DEVICES
command, see page 1241. For more information about the DEVICES statement,
see the z/VM: CP Planning and Administration book.
Response 1:
To allow dynamic I/O changes on the system, enter the following SET
DYNAMIC_I/O command:
set dynamic_i/o on
System is now enabled for dynamic I/O changes
Ready;
If CP is already allowing dynamic I/O changes when you issue the SET
DYNAMIC_I/O ON command, you see the following response:
set dynamic_i/o on
System is already enabled for dynamic I/O changes
Ready;
Response 2:
SET DYNAMIC_I/O
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Chapter 2. CP Commands 1247