You can expand the capacity of DP-VOLs used in a TC pair and each software pair when a TC pair shares the same volumes with global-active device (GAD), Universal Replicator (UR), ShadowImage (SI), and Thin Image Advanced (TIA).
When a TC pair shares the same volumes with other software, the order in which you expand the DP-VOL capacity consists of the following two expansion orders:
- Expansion order in a point-to-point configuration of the TC pair
- Expansion order in a point-to-point configuration of each software product
- When a remote replication pair (TC/UR/GAD) is included, first expand the S-VOL capacity that is the endpoint of the remote replication pair, and then expand the P-VOL capacity. For more information about the specific expansion procedure, see Expanding DP-VOL capacity when TrueCopy pair is used with Universal Replicator.
- When a remote replication pair (TC/UR/GAD) shares the same volumes with a local replication pair (SI/TIA), first expand the capacity of the S-VOL group of the remote and local replication pairs. The S-VOL group consists of the S-VOL of the remote replication pair and all volumes of the local replication pairs that share the S-VOL. After expanding the capacity of the S-VOL group, expand the capacity of the P-VOL group of the remote and local replication pairs. The P-VOL group consists of the P-VOL of the remote replication pair and all volumes of the local replication pairs that share the P-VOL.
The expansion order in each group follows the expansion order of the local replication pairs. For more information about the specific expansion procedures, see Expanding DP-VOL capacity when TrueCopy pair is used with ShadowImage and Expanding DP-VOL capacity when TrueCopy pair is used with Thin Image Advanced .
- For the local replication pair (SI/TIA), expand the capacity in the order from the highest layer to the lowest. The expansion order is not specified for the volumes in the same layer.