Workflow for managing ShadowImage pairs

During most pair tasks, the P-VOL remains available to the host for I/O operations. You must have the Storage Administrator (Local Copy) role to perform SI pair tasks.

Complete the following steps to complete pair tasks:

1. Check the SI pair status and the status of related L1 and L2 pairs to determine if you can perform a task.

2. Create the SI pairs.

3. (Optional) Suspend SI pair creation.

4. (Optional) Suppress update copy operations during pair restoration.

5. Split the pairs. You can do the following:

• Split SI pairs.

• Split SI pairs in a CTG.

6. Resynchronize or restore the SI pairs.

7. (Optional) If you have performed a Quick Resync on the pair (PAIR status), suppress copy processing.

8. Delete the SI pairs, which ends the pair relationship between the pair volumes.

It may be a long time before a ShadowImage copy operation starts, because differential tables are initialized for the relevant pairs, one pair at a time, before the copy operation starts. Especially when the pairs use a large volume of data, initialization can be a very long process.

Related concepts

• ShadowImage pair creation

Related tasks

• Suspending ShadowImage pair creation

• Suppressing update copy operations during pair restoration

• Splitting ShadowImage pairs

• Workflow for splitting pairs in a consistency group

• Resynchronizing or restoring ShadowImage pairs

• Suppressing update copy operations during pair restoration

• Deleting ShadowImage pairs