If you wish to add storage control subordinates to an existing
Global Mirror session, you must stop the session and start it again
with the new ESS specified.
To add storage control subordinates to a session that is already
started:
- Issue the RSESSION STOP command to the same CKD LSS in the master
storage control where the start was issued.
- Use the PPRC Establish Path command to establish FCP paths between
the master and any new subordinate storage controls that will be participating
in the session.
- Use the RSESSION DEFINE command to define the session to the LSSs
in the new subordinate storage controls that are to participate in
the session.
- Issue the RSESSION START command to the master, specifying the
updated topology and performance parameters for the session.
If additional LSSs are to be added to a session that is already
started, and another LSS in the same ESS already belongs to the session
(the ESS is already a master or subordinate), the session
need not be stopped and restarted.