Sharing volumes with Universal Replicator

You can share SI P-VOLs with UR P-VOLs and S-VOLs.

• You can use SI cascaded pairs as UR pairs. In cascaded pairs, UR does not distinguish between node and leaf volumes. Both are considered as S-VOLs.
• (VSP One B85) If you plan to Quick Restore the SI pair, you must first suspend the UR pair.
• You can perform a CTG pair-split on SI pairs that share volumes with UR S-VOLs.

  For more information about using CTG pair-split on pairs with shared volumes, see Using consistency group pair-split with shared volumes.

• (VSP One Block 85) When you share an SI P-VOL with a UR S-VOL, if you split the SI pair during write I/Os to the UR P-VOL, only part of write I/Os might be written to the SI S-VOL. To keep data consistency in the SI S-VOL, use consistency group pair-split to split the SI pair.
• (VSP One Block 85) If you request splitting all SI pairs in the same consistency group, the request is accepted only when all associated UR pairs are in PAIR, PSUS, or PSUE status. If the associated UR pairs are not in any of these statuses, the status of the SI pairs in the consistency group does not change. For details about whether SI pairs can be split using consistency group pair-split for each UR pair status, see Using consistency group pair-split with shared volumes.

For more information about sharing SI and UR volumes, see the related appendix in the Universal Replicator User Guide for VSP One Block.

The following table describes ShadowImage operations when SI P-VOLs are shared with UR P-VOLs or S-VOLs.

The following table describes ShadowImage operations when SI S-VOLs are shared with UR P-VOLs.