Compaq StorageWorks Data Replication Manager HSG80 ACS Version 8.5P Operations Guide

Managing Site Failover and Failback Procedures 5–11
Target Site Simple Failback Procedure
1. To see the operation mode of the remote copy sets, type the following CLI command:
SHOW REMOTE_COPY_SETS FULL
NOTE: The target site automatically initiates a full copy, if needed, when the connection is
restored.
If the remote copy set was in synchronous mode and the initiator site controllers are not
removed and write history logging was enabled at the target site when the initiator is restored,
the target site controllers will initiate will incur a fast-failback of the data. If you have exceeded
the capacity of the log unit, a full copy occurs.
IMPORTANT: You must wait for normalization on all remote copy sets to complete before you
can proceed. However, you can continue performing I/O to the units at the target site during
normalization.
3. Enter a SHOW REMOTE_COPY_SETS FULL command to see a percentage of
completion. When the remote copy sets are all normalized, the Target field of the
display will be NORMAL.
SHOW REMOTE_COPY_SETS FULL
4. When all remote copy sets are done normalizing and you decide to move operations
back to the initiator site, shut down the target site host(s).
5. Disable host access to the target units by using the following CLI command:
SET UnitName DISABLE=(TargetHostConnectionNamex,TargetHostConnectionNamey)
6. Turn off write history logging if enabled:
SET AssociationSetName NOLOG_UNIT
Repeat this procedure for each association set.
7. Delete the association set by using the following CLI command:
DELETE AssociationSetName
2. If you made the decision to remove the remote copy set targets, the targets
should be added at this time, using the following CLI commands:
SET RemoteCopySetName ADD=InitiatorRemoteCopyName\UnitNumber
Example: SET rcs1 ADD=buildngA\d1
Repeat this step for all remote copy sets.