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

SET CONFIGMODE
►►
Set
Authorization
Purpose
Operands
CONFIGmode
Usage Notes
ON
OFF
RESET
Privilege Class: B
Use SET CONFIGMODE to turn configuration mode on or off. Configuration mode
is a machine state that is used to change your I/O configuration dynamically.
The dynamic I/O commands are:
DEFINE CHPID DEFINE PATH
DELETE CHPID DELETE PATH
MODIFY CHPID MODIFY PATH
DEFINE CU DEFINE CNTLUNIT
DELETE CU DELETE CNTLUNIT
MODIFY CU MODIFY CNTLUNIT
DEFINE DEVICE DEFINE IODEVICE
DELETE DEVICE DELETE IODEVICE
MODIFY DEVICE MODIFY IODEVICE
SET CONFIGMODE SET DYNAMIC_I/O
ON
tells CP to enter configuration mode.
OFF
tells CP to exit configuration mode.
SET CONFIGMODE
RESET
tells CP to enter or exit configuration mode even if there is a mismatch between
the system’s and the hardware’s view of the I/O configuration.
1. Whenever you issue one of the dynamic I/O commands, CP puts you in
configuration mode, processes the dynamic I/O command, and then takes you
out of configuration mode.
2. Whenever you dynamically change your I/O configuration using one of the
dynamic I/O commands, CP must perform a certain amount of overhead. If you
want to issue several dynamic I/O commands in succession and you are
concerned about performance, issue the SET CONFIGMODE ON command,
issue your dynamic I/O commands, and then issue the SET CONFIGMODE
►◄
Chapter 2. CP Commands 1209