Dell EqualLogic PS6210XS EqualLogic Group Manager Administrator s Guide PS Ser - Page 275
About Failing Over and Failing Back a Volume
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About Failing Over and Failing Back a Volume If a failure or maintenance in the primary group makes a volume unavailable, you can fail over to the secondary group and allow users to access the volume. If the primary group becomes available, you can fail back to the primary group. Restriction: You cannot replicate a recovery template volume, and you cannot demote a template volume to a failback replica set. After you complete the operation, initiators can connect to the volume on the primary group and replication can continue as usual. By default, the failback baseline is reestablished. NOTE: Snapshots must be offline for failback to occur. Example of Failing Over and Failing Back a Volume An example of how to fail over a volume to the secondary group and then fail back to the primary group is shown in Figure 21. No Failure (Data Available) to Figure 25. Step 3-Fail Back to the Primary Group. Figure 21. No Failure (Data Available) shows the replication configuration, where GroupA is replicating Volume1 to GroupB. Figure 21. No Failure (Data Available) Figure 22. Primary Group Failure (Data Not Available) shows the replication configuration after a failure in the primary group (GroupA). About Data Recovery 275
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