Stopping DFSMSrmm

You can stop the DFSMSrmm subsystem with the z/OS STOP command, as shown in Figure 1:

Figure 1. Stopping DFSMSrmm

P DFRMM

If the operator defers the reply to the WTORs, DFSMSrmm shutdown might wait until the operator enters a reply. This is also true if active or new tasks are in hold. If shutdown is delayed, DFSMSrmm issues message EDG0154I to notify the operator that action is required. If the STOP command is rejected, message EDG1108E is issued.

When DFSMSrmm is stopped, DFSMSrmm completes these tasks:

DFSMSrmm completes any requests being processed at the time DFSMSrmm is stopped.
DFSMSrmm completes any requests accepted by DFSMSrmm but that are currently waiting to be processed, except for requests to start DFSMSrmm inventory management. DFSMSrmm fails requests to start DFSMSrmm inventory management.
If DFSMSrmm is already quiesced, DFSMSrmm does not process the waiting requests. DFSMSrmm issues message EDG1105I indicating that the requests are still waiting to be processed. If any of the requests are for catalog activity notifications, DFSMSrmm provides additional message text in message EDG1106I. DFSMSrmm issues a WTOR EDG1107D with options to STOP, QUIESCE, RESTART DFSMSrmm with the same parmlib member or RESTART DFSMSrmm with a new parmlib member.
DFSMSrmm fails new requests with the RMM not active reason.

To stop DFSMSrmm and still allow tapes to be used, issue the commands shown in Figure 2 to disable the DFSMSrmm subsystem interface until the next time you IPL or start the DFSMSrmm subsystem.

Figure 2. Disabling the DFSMSrmm subsystem interface

S DFRMM,OPT=RESET
P DFRMM

Before DFSMSrmm disables the subsystem interface, it ensures that the user who made the request is authorized. To disable the DFSMSrmm subsystem interface by using the RESET option, you must have a security profile in place. If your installation does not have RACF or an equivalent security product installed, DFSMSrmm allows the reset request. In order to control the request, you can write a RACROUTE exit to test for the security profile and return an acceptable return code. See Authorizing DFSMSrmm users and ensuring security for additional information.

Tell the operator to reply to any DFSMSrmm WTORs issued between issuing the commands shown in Figure 2. The operator must reply to any DFSMSrmm WTORs before entering the STOP command. If the RESET option is used to allow tape usage to continue, the operator should first enter the command:

S DFRMM,OPT=RESET

The operator should reply to the outstanding WTORs and then enter the STOP command. If the operator defers the reply to the WTORs, DFSMSrmm shutdown might hang until the operator enters a reply. If shutdown is delayed, DFSMSrmm issues message EDG0154I to notify the operator that action is required.