Compaq StorageWorks Data Replication Manager HSG80 ACS Version 8.5P Operations Guide
Managing Site Failover and Failback Procedures 5–7
Planned Failover
The Planned Failover Procedure must be used with the Simple Failback Procedure.
From the Initiator Site—Preparation
1. Before performing the failover procedure, locate your record of SHOW command
output that details the current initiator configuration. (The procedure for obtaining a
record of your initiator configuration is detailed in the Configuration chapter.) Verify
that your target controller configuration is the same as your initiator controller
configuration.
2. If the operating system is up and running, shut down the operating system, and power
off the hosts. (This is not necessary with OpenVMS.)
3. If your remote copy sets are set for asynchronous operation mode, switch to
synchronous mode using the following CLI command:
SET RemoteCopySetName OPERATION_MODE=SYNCHRONOUS
Repeat this step for all remote copy sets.
4. Turn off logging for the association sets (if enabled) with the following CLI command:
SET AssociationSetName NOLOG_UNIT
Repeat this step for all association sets.
6. This applies whether you are operating at the initiator site during normal
operations or at the target site after a failover.
7. To clear this condition you must repair or replace the failed controllers, then:
❏ Fix the extended link condition or
❏ Remove the remote copy sets
8. After these conditions are met, both controllers must be restarted to clear the
faulted state
9. By not removing the remote copy sets when both extended site connections are
lost, you will be prohibited from moving LUNS from one HSG80 controller to
the other HSG80 controller at the operating system level.
Table 5–2 DRM Planning Considerations (Continued)