- Record the pair status and fence level of each S-VOL.
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Analyze the consistency of the
S-VOLs, based on pair status and the Primary Volume Fence Level setting.
For TC pairs specified with fence level "never", perform further analysis and determine whether the data in the S-VOL is guaranteed. Perform either of the following methods:
- Use the sense information transferred by host failover.
- Compare the file (such as the database log file) that confirms the integrity of data in the S-VOL with the content of the S-VOL. Use the file that confirms the integrity of data in the S-VOL for restoration.
- Perform file recovery as needed.
-
Run the
CCI horctakeover or pairsplit -RS command on the S-VOL.
If a failure occurs after the one volume capacity of a TC pair can be expanded, the swap resync operation of the TC pair cannot be performed because the capacity of both the volumes is not the same. Make sure to expand the other volume capacity so that the capacity of both the volumes is the same, and then retry the operation.
- Complete file recovery procedures.
- Vary the S-VOLs online.
- At the secondary site, start critical host operations, with the previous S-VOLs now the P-VOLs.