You can recover from a failure if only one volume capacity in a TC pair can be expanded, while a failure occurs on the other volume before the expansion.
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Start to recover from the failure using one of the TC disaster recovery operations.
Depending on the operations during the recovery procedure, one or more of the following actions are required:
- If the operation is resynchronizing a TC pair
The resynch operation cannot be performed because the capacity of the P-VOL and S-VOL in the TC pair is not the same.
Complete Steps 2 and 3 before the TC pair resynch operation.
- If the operation is,
- Deleting a TC pair
- Recovering from a volume failure
- Re-creating a TC pair
The TC pair cannot be created because the capacity of the target P-VOL and S-VOL is not the same when re-creating the TC pair.
Complete Steps 2 and 3 immediatelybefore the TC pair resynch operation.
- If the operation is,
- Deleting a TC pair
- Deleting a volume
- Creating a volume
- Re-creating a TC pair
The TC pair cannot be created because the capacity of the target P-VOL and S-VOL is not the same when re-creating the TC pair. Make sure that the capacity of the P-VOL and S-VOL is the same when creating the volumes.
Skip Steps 2 and 3.
- If the operation is resynchronizing a TC pair
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Expand the capacity of volumes whose capacity is not expanded, and then make
sure that the capacity of the P-VOL and S-VOL in the TC pair is the same.
When a TC pair is used with other software, the capacity of the P-VOLs and S-VOLs in all of the used software products must be expanded. For more information about the order in which the volume capacity is expanded, see Expansion order policy when TrueCopy pair shares the same volumes with other software.
- Restart the resync operation and the creation of the TC pair by following one of the TC disaster recovery operations.