Expanding DP-VOL capacity when a ShadowImage pair shares the same volume with other software

You can expand the capacity of DP-VOLs used in an SI pair and each software pair when an SI pair shares the same volumes with the following software:

• TrueCopy (TC)
• global-active device (GAD)
• Universal Replicator (UR)
• Thin Image (HTI)

When an SI 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 SI pair
• Expansion order in a point to point configuration with each software product

The following describes the guidelines for the order in which you expand the DP-VOL capacity when an SI pair shares the same volumes with other software.

1. When a remote replication (TC/UR/GAD) is included, expand first the S-VOL capacity on the end of the remote replication, and finally expand the P-VOL capacity.
2. When a remote replication (TC/UR/GAD) shares the same volumes with a local replication (SI/HTI), expand the capacity in each following group. Expand first the capacity of the S-VOL group in the remote replication, and then expand the capacity of the P-VOL group in the remote replication:
   1. S-VOL group that consists of the S-VOL of the remote replication and all volumes of the local replication with which the S-VOL shares the same volume.
   2. P-VOL group that consists of the P-VOL of the remote replication and all volumes of the local replication with which the P-VOL shares the same volume.

      The expansion order in each group follows the expansion order in the local replication.

3. In the local replication (SI/HTI), 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.