Common Platform Issues

■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:

NameUsesUsed 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.

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Data Replication Manager HSG80 ACS Version 8.7P Release Notes