HP XP7 Storage - Manual (Page 118)

Related topics
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“Viewing formatted pool capacity and pool usage rates” (page 113)
Increasing pool capacity
Adding pool-VOLs to a pool increases, or expands, the pool’s capacity. Check the pool’s available
capacity and expand the pool as needed.
Use the following formula to calculate the pool capacity:
Pool capacity = the total capacity of pool-VOLs in the pool - the
management area size of the pool-VOL with the system area
Adding pool-VOLs to pools to expand pool capacity moves data to the added space on a per-page
basis which rebalances the usage rate among parity groups of the pool-VOLs.
CAUTION: Moving existing data to the added space on a per-page basis can decrease host
I/O performance.
You can add up to 1,024 pool-VOLs (including volumes already in a pool) to a pool.
Prerequisite: You are currently not decreasing the pool capacity.
1.
In the RWC main window, in the resource tree in the Explorer, click Pools > Pools.
2. In the Pools tab in the Pools window, select the check box for the pool to which you want to
add a pool-VOL from the list and then click Expand Pool.
NOTE: You can only increase the capacity for one pool at a time.
118 Monitoring and maintaining Fast Snap