Reverse resynchronization
You can use the Reverse Copy (Secondary > Primary) method to restore
pairs.
This method performs a full restoration of P-VOL data from the S-VOL.
Resynchronizing Thin Image pairs
You can resynchronize Thin Image pairs that you have split or that the
storage system has suspended.
Resynchronizing pairs does the following:
• Updates the S-VOL so that it is again paired with the P-VOL.
• Frees up the P-VOL’s snapshot differential data for that P-VOL to reuse.
Note: If the amount of snapshot data in selected P-VOLs or the total number
of pairs in selected snapshot groups exceeds 37,768, an error message
appears when attempting to perform pair tasks.
Before you begin
• You must have the Storage Administrator (Local Copy) role.
Procedure
1. In the Explorer pane, click Storage Systems, expand the storage
system tree, expand Replication, and then click Local Replication.
2. In the Local Replication window, select a P-VOL in the TI Root
Volumes tab or a snapshot group in the Snapshot Groups tab.
3. Click Operate TI Pairs.
4. In the TI Pairs window, select the pair you want to resynchronize, and
then click Resync Pairs.
5. For Resync Type, select Normal Copy (Primary > Secondary) for full
forward resynchronization of data from the P-VOL to the S-VOL.
6. Click Finish, and then confirm the settings.
7. Accept the default task name or enter a unique name.
You can enter up to 32 letters, numbers, and symbols, except the
following:
\ / : , ; * ? " < > |
8. If you want to monitor the task after submitting it, select Go to tasks
window for status.
9. Click Apply to submit the task.
Result
The Thin Image pair is resynchronized ("PAIR" status).
144 Managing Thin Image Pairs
Hitachi Thin Image User Guide for Hitachi Virtual Storage Platform G Series and F Series
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