SET DYNAMIC_I/O

Read syntax diagramSkip visual syntax diagram Set DYNamic_i/oDYNamic_ioONOFF

Authorization

Privilege Class: C

Purpose

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.

Operands

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.

Usage Notes

  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 z/VM®: CP Planning and Administration.
  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 SET DEVICES. For more information about the DEVICES Statement, see z/VM: CP Planning and Administration.

Responses

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:

To prevent dynamic I/O changes on the system, enter the following SET DYNAMIC_I/O command: 
set dynamic_i/o off
System is now disabled for dynamic I/O changes
Ready;
If CP is already preventing dynamic I/O changes when you issue the SET DYNAMIC_I/O OFF command, you see the following response: 
set dynamic_i/o off
System is already disabled for dynamic I/O changes
Ready;

Messages

  • HCP026E Operand missing or invalid
  • HCP643E Command not enabled in system configuration file
  • HCP6809E This processor does not support dynamic I/O changes
  • HCP6815E Cannot find configuration token in the channel subsystem
  • HCP6815E Command failed in the channel subsystem
  • HCP6816E Dynamic I/O changes are not allowed because LPAR information is not available
  • HCP6850E Cannot disable dynamic I/O changes A dynamic I/O change is in progress
  • HCP6850E Cannot disable dynamic I/O changes System is in configuration mode