HP Storageworks HSG80 Manuale Utente

Common Platform Issues

10

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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.

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. 

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. 

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.