What To Check After Running Cluster Recovery; Backing Up And Restoring The Cluster Configuration - IBM Storwize V7000 Troubleshooting And Maintenance Manual

Attention: If the time stamp is not less than 10 minutes before the cluster failure, call IBM support.
If you do not meet all the conditions that were discussed previously, call IBM Support.
Verify the date and time of the last backup date. The time stamp must be less than 24 hours before
the cluster failure. The time stamp format is YYYYMMDD hh:mm, where YYYY is the year, MM is the
month, DD is the day, hh is the hour, and mm is the minute.
Attention: If the time stamp is not less than 24 hours before the cluster failure, call IBM Support.
Changes made after the time of this backup date might not be restored.
After the recovery completes successfully, perform the checks to get your environment operational.

What to check after running cluster recovery

Several tasks must be performed before you use the volumes.
Differences to be aware of regarding the recovered configuration:
®
v FlashCopy mappings are restored as "idle_or_copied" with 0% progress. Both volumes must have
been restored to their original I/O groups.
v The cluster ID is different. Any scripts or associated programs that refer to the cluster ID of the cluster
must be changed.
v Any FlashCopy mappings that were not in the "idle_or_copied" state with 100% progress at the point
of disaster have inconsistent data on their target disks. These mappings must be restarted.
v Intercluster remote copy partnerships and relationships are not restored and must be re-created
manually.
v Consistency groups are not restored and must be re-created manually.
v Intracluster remote copy relationships are restored if all dependencies were successfully restored to
their original I/O groups.
v The cluster time zone might not have been restored.
Before using the volumes, perform the following tasks:
v Start the host systems.
v Manual actions might be necessary on the hosts to trigger them to rescan for devices. You can perform
this task by disconnecting and reconnecting the Fibre Channel cables to each host bus adapter (HBA)
port.
v Verify that all mapped volumes can be accessed by the hosts.
v Run file system consistency checks.
v Run the application consistency checks.

Backing up and restoring the cluster configuration

You can back up and restore the cluster configuration data after preliminary tasks are completed.
Cluster configuration data provides information about your cluster and the objects that are defined in it.
The backup and restore functions of the svcconfig command can only back up and restore your cluster
configuration data. You must regularly back up your application data using the appropriate backup
methods.
You can maintain your cluster configuration data by completing the following tasks:
v Backing up the cluster configuration data
v Restoring the cluster configuration data
v Deleting unwanted backup configuration data files
Before you back up your cluster configuration data, the following prerequisites must be met:
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Storwize V7000 Version 6.1.0: Troubleshooting, Recovery, and Maintenance Guide