You can expand the capacity of DP-VOLs used as pair volumes when a GAD pair is used with TIA. This procedure provides an example for expanding the DP-VOL capacity in a configuration where the TIA L1 pair and L2 pair are created for each volume of the P-VOL and S-VOL in the GAD pair. For the detailed procedures for verifying the differential data management method, expanding the capacity, and verifying the expansion during the following procedure, see Expanding DP-VOL capacity used in GAD pair.
- A V-VOL to be expanded is not an external volume.
- The LDEV format is not being performed on a V-VOL to be expanded.
- A pool containing a V-VOL to be expanded meets any of the following
conditions:
- Normal condition
- The pool is not being shrunk
- When using GAD, TC, or UR, make sure that there is enough software license capacity for the page capacity assigned to the expanded volume capacity before the expansion.
- For Thin Image Advanced specific prerequisites, see the procedure for expanding volume capacity in the Thin Image Advanced User Guide for VSP One Block.
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Expand each volume capacity, and then verify that the expansion is complete in
the expansion order shown in the following figure.
After expanding the first volume capacity (S-VOL in the GAD pair), if you cannot expand the DP-VOL capacity in the TIA pair, you cannot expand the P-VOL capacity in the GAD pair, or resynchronizing the GAD pair, make sure to perform the recovery procedure described in Recovering from failure if one volume capacity in GAD pair cannot be expanded.