For details on the feature and execution methods of the z/OS commands, and the features, and setting methods of the options, see the IBM® publications.
- Run the following MVS system operator command on all hosts with z/OS online to disable the PPRCSUM feature:
F DEVMAN,DISABLE(PPRCSUM)
- Run the following MVS system command, and then verify that Byte27,Bit5 (Byte24-31,Bit29) in READ FEATURE CODES is OFF:
DS QD,[DEV#],RDFEATS
Tip: For DEV#, use the DEV# on which VaryOn is being performed in the CU.Command output example:
Verify the bold part (X0) in the following command output example, and then verify that the X4 Bit is OFF.
DS QD,xxxx,RDFEATS UNIT VOLSER SCUTYPE DEVTYPE CYL SSID SCU-SERIAL DEV-SERIAL EFC 0xxxx xxxxxx xxxxxxx xxxxxxx xxxx xxxx xxxx-xxxxx xxxx-xxxxx xxx READ FEATURE CODES xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxX0xxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx
- Clear the error information for configuration setting commands run asynchronously in CCI.
# raidcom reset command_status
- Disable PPRCSUM for the system.
Example: Disable function ID 9 for mainframe system feature while enabling ID 2, ID 3, and ID 9.
# raidcom modify mainframe_system_function -set_function_id 2 3
- Verify the error information for configuration setting commands run asynchronously in CCI.
Make sure that the value of ERR_CNT is 0.
# raidcom get command_status
- Obtain the information about the configured mainframe system function and verify that the specified settings have been applied.
# raidcom get mainframe_system_function
If the command ends abnormally when PPRCSUM is disabled by using the raidcom modify mainframe_system_function, PPRCSUM has not been disabled in the OS.
Run the MVS system operator command (Disable setting: F DEVMAN, DISABLE(PPRCSUM)) on z/OS on all online hosts, and then disable PPRCSUM again. If the command ends abnormally when PPRCSUM is disabled, the host continues to have the feature enabled.
If the command ends abnormally when PPRCSUM is disabled even after running the MVS system operator command (Disable setting: F DEVMAN, DISABLE(PPRCSUM)), retry steps 1 and 2 again.
If Byte27,Bit5 (Byte24-31,Bit29) in READ FEATURE CODES is OFF, you can disable PPRCSUM. If PPRCSUM is not disabled even after retrying, the host might not recognize that PPRCSUM has been disabled. In this case, perform VaryOff on all LDEVs in the CU, and then perform VaryOn. Alternatively, specify DISABLE(PPRCSUM) in the OS parameter SYS1.PARMLIB(DEVSUPxx) on the z/OS system to perform an IPL.