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

ShadowImage User Guide

Version
9.8.7
Audience
anonymous
Part Number
MK-98RD9021-17

When the SI pair shares the same volumes with other software, there is an order in which you must expand the DP-VOL capacity. For more information about the specific expansion order, see the User Guide for the remote replication that is used with the SI pair.

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.
Figure. Expansion order when TC/UR/GAD pair shares the same volumes with local replication
  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.