Assigning secondary volumes to snapshot data after creating new Thin Image pairs

Thin Image User Guide
Version
9.8.6
Audience
anonymous
Part Number
MK-98RD9020-16
You can assign an S-VOL to snapshot data after creating a new Thin Image pair.
Note: If the amount of snapshot data in selected P-VOLs or the total number of pairs in selected snapshot groups exceeds 32,768, an error message appears when attempting to perform pair tasks.

If you use CCI commands, see Pair tasks using CCI or Device Manager - Storage Navigator.

You must have the Storage Administrator (Local Copy) role.

  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, click Create TI Pairs.
    You can specify P-VOLs in Device Manager - Storage Navigator until the total number of snapshots or clones reaches 32,768. In addition, you can specify snapshot groups until the total number of pairs reaches 32,768.
  5. In Use Primary Volumes of Thin Image Pairs, or Create Pairs using Volumes as Root Volumes, select Yes or No.
  6. In Select By, select LUN to create a pair by specifying LUN. Select LDEV to create a pair without specifying LUN.
  7. From the Available Primary Volumes table, select the LDEV you want to assign as the P-VOL.
    Note: The nondisruptive migration volumes do not appear in the Available Primary Volumes table.
  8. In Cascade, select Enable to create a cascaded pair.
  9. In Pair Type, select Snapshot to create a pair with the snapshot attribute. Select Clone to create a cloned pair. If you selected No for Create Pairs using Volumes as Root Volumes, go to step 13.
  10. Click Select Pool.
  11. In the Select Pool window, select a pool from the Available Pools table.
  12. Click OK.
  13. For Snapshot Group, select either Create New to assign the pair to a new snapshot group, or Use Existing to assign the pair to an existing snapshot group. When you create a Thin Image pair, you must assign it to a snapshot group.
    Complete one of the following:
    • For Create New, enter values for Number of Snapshot Data per Primary Volume, Prefix, and Initial Number, and then select Snapshot Group Configuration.

      When you specify an initial number that was already registered, the smallest available number that is the same as or larger than the specified number is automatically set.

    • For Use Existing, select Snapshot Group Configuration, and then select the snapshot group to which you want to assign the pair from the Available Snapshot Groups table. If you select All, enter a value in Number of Snapshot Data per Primary Volume.
    Note: To create pairs and assign the pairs to a snapshot group by using CCI, see Adding Thin Image pairs to snapshot or consistency groups using CCI.
  14. Click Add.
    The selected LDEV is moved to the Selected Primary Volumes table.
  15. Click Next.
  16. From the Available LDEVs table, select the LDEV you want to assign as the S-VOL, and then click Set.
    The selected LDEV is displayed in the Secondary Volumes column of the Selected Pairs table.
    Note:
    • The nondisruptive migration volumes do not appear in the Available Primary Volumes table.
    • If you select a capacity in Capacity, the Available LDEVs and Selected Pairs tables display the LDEVs that match the selected capacity.
    • If you select a row in the Available LDEVs table and a row in the Selected Pairs table and then click Set, you can configure a pair.
  17. Click Finish, and then confirm the settings.
  18. Accept the default task name or enter a unique name.
    You can enter up to 32 letters, numbers, and symbols, except the following:

    \ / : , ; * ? " < > |

  19. If you want to monitor the task after submitting it, select Go to tasks window for status.
  20. Click Apply to submit the task.
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