RESTART operation (XRC)

The format of the RESTART command is as follows:

F ANTAS005,RESTART

This is a serviceability function that forces the XRC session to restart with minimal affect to the storage control session. Use this operation when it appears that the system data mover has stalled or is not responding in the expected manner. The RESTART command, which you can only direct to the ANTASnnn address space associated with the session you want to restart, performs the following actions:

  1. Generates an SVC dump of the ANTASnnn address space.
  2. Saves the software bitmaps into the state data set for all volumes in the XRC session that are attached to storage controls that support hardware bitmapping.
  3. Suspends the XRC session and ends the ANTASnnn address space.
  4. Restarts the XRC session. When the ANTASnnn address space has restarted, the SDM begins to drain updated records from the cache for storage controls that do not support hardware bitmaps.

After the XRC session has restarted, you can issue XADDPAIR commands to bring all of the suspended volumes back into the session. Storage controls that support hardware bitmapping resynchronize the volumes from the stored bitmap information.

Parent topic: Diagnosing system data mover functions with the MVS MODIFY command