When the HTI 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 HTI pair.
You can expand the capacity of DP-VOLs used in an HTI pair and each software pair when an HTI pair shares the same volumes with the following software:
- TrueCopy (TC)
- global-active device (GAD)
- Universal Replicator (UR)
- ShadowImage (SI)
- Expansion order in a point to point configuration of the HTI pair
- Expansion order in a point to point configuration with each software product
Figure. Expansion order when TC/UR/GAD pair shares the same volumes with local replication
- 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.
- 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:
- 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.
- 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.
- 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.