Thin Image data pool requirements

Pool capacity

Calculate the pool capacity (see Calculating and assigning pool capacity).

The maximum total capacity of pools in a storage system depends on the storage system model:

• VSP 5000 series: 12.3 PB (if Extension1, Extension2, or Extension3 is added in the shared memory capacity).
• VSP E990, VSP E1090: 16.6 PB
• VSP E790: 12.5 PB
• VSP E590: 8.05 PB

The maximum pool capacity that can be used for each Thin Image P-VOL is 768 TB.

Pool-VOL limit per pool

1,024

Note: You cannot assign a volume that is already assigned to a pool as a pool-VOL to another pool.

Pool limit per storage system

• VSP 5000 series: 128

  Pool IDs are assigned from 0 to 127.

• VSP E990, VSP E1090: 128

  Pool IDs are assigned from 0 to 127.

• VSP E790: 64

  Pool IDs are assigned from 0 to 63.

• VSP E590: 64

  Pool IDs are assigned from 0 to 63.

This can include HDP (including HDT and active flash), HDPz (including HDTz and active flash for mainframe), and HTI pool types.

Increasing capacity

Dynamically increase the pool-VOL capacity. To do this, increase the capacity for at least one parity group.

Decreasing pool capacity

Use the following workflow to decrease pool capacity:

1. Delete the pool-VOLs (see Decreasing pool capacity).
2. Reconfigure the pool (see Creating Thin Image data pools).

Deleting pools

The pool is not used by an HTI pair.

For more information about deleting pools, see Deleting pools.

Data pool warning threshold

Value: Warning Threshold

Range: 20 - 95%, in 1% increments.

Default: 80%

For more information:

• About editing the data pool warning threshold, see Editing the data pool warning threshold.

• About checking alerts and checking the details of a SIM, see the System Administrator Guide for your storage system.

• About SNMP traps, see the Hitachi Alert Notification Guide.