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

SET IOCDS_ACTIVE
SET IOCDS_ACTIVE
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Set
Notes:
Authorization
Purpose
Operands
(1)
IOCDS_active
Usage Notes
Privilege Class: B
Use SET IOCDS_ACTIVE to change the input/output configuration data set
(IOCDS) file that the processor will use during the next power-on reset (POR).
An
Bn
An
Bn
1 You must specify one IOCDS file in the range A0 through A5 or B0 through B5.
1258 z/VM: CP Commands and Utilities Reference
is the file type of the IOCDS file that you want the processor to use during the
next POR. The variable n is a decimal number between 0 and 5.
1. Once you issue the SET IOCDS_ACTIVE command to change the active
IOCDS file, the SE automatically puts the new IOCDS file in write-protect mode
for you. This means that no one can make changes to the active IOCDS file.
2. If the current hardware configuration does not match the IOCDS file that you
specify, CP issues error message HCP6814E and terminates command
processing.
3. Whenever you issue one of the following dynamic I/O commands:
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
CP puts you in configuration mode, processes the dynamic I/O command, and
then takes you out of configuration mode.
4. Before you can use any I/O devices, you must include those devices in the
hardware’s and software’s view of the I/O configuration.
The software creates its view of the I/O configuration at initialization either by
sensing the I/O device, by reading RDEVICE statements in the system
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