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Common Platform Issues
10 Data Replication Manager HSG80 ACS Version 8.7P Release Notes
■ If the target LUNs are dropped:
1. Wait five minutes to allow for the target controller memory diagnostics to complete.
2. Add the targets back into the remote copy sets.
The full copy operation begins.
Required Delay Time Before Failback
Be careful that you do not start a site failover or site failback process too soon. You must wait
a minimum of 15 minutes from the completion of a site failover process to begin a site failback
procedure. You must also wait a minimum of 15 minutes from the completion of a site failback
process to begin a site failover procedure.
Removing Targets from the Proper Controller
The target of a remote copy set should be removed by the controller to which it is online. A
problem occurs if both fabric intersite links are not functioning and you remove the target of a
remote copy set that is part of an association set with a write history log. If you try to remove
the target from the controller that the remote copy set is not online to, and then issue the CLI
command SHOW REMOTE COPY SET FULL, the target state will indicate LUN D0 is
copying 0% complete. The actual indication of the target state should be "No targets."
Example:
Name Uses Used by
---------------------------------------------------------------------------
RCS1 remote copy D1 AS1
Reported LUN ID: 6000-1FE1-0007-9DD0-0009-0510-3907-000E
Switches:
OPERATION_MODE = SYNCHRONOUS
ERROR_MODE = NORMAL
FAILOVER_MODE = MANUAL
OUTSTANDING_IOS = 20
Initiator (BUILDNGA\D1) state:
ONLINE to the other controller
Target state:
\D0 is COPYING 0% complete
Another problem occurs when you try to add the target back in. You will see the %EVL error
message: "Too many targets have been specified in this set." You cannot add a target if you are
in a normal production mode or if you are in a failed-over condition. You must first issue the
CLI command to delete the remote copy set, and then issue the CLI command to add the
remote copy set back in. Deleting and then re-adding the remote copy set will force
normalization.
If your intersite links will be down for an extended period of time after a failover, HP
recommends that you delete your associations sets and then remove your remote copy sets to
the target controller. This may require a remapping of your host to LUN connections with
some operating systems. Run the initiator controller in standalone mode until your intersite
links are re-established.
Startup of Only One Fabric at a Time
When an event occurs that causes a fabric reconfiguration (for example, a scheduled or
unscheduled outage of an intersite link, addition or removal of a switch or switch-to-switch
link, and so on), allow all of the Fibre Channel switches in that fabric to reconfigure before
you reconfigure the second fabric.