Creating pools
When you create a pool, you select the pool volumes (pool-VOLs) for the pool (manually or automatically) and set options such as the subscription limit and the warning and depletion thresholds for the pool. You can also enable options such as V-VOL protection and data deduplication.
The following procedures describe how to create pools for Dynamic Provisioning and Dynamic Tiering.
- Creating Dynamic Provisioning pools by selecting pool-VOLs manually
- Creating Dynamic Provisioning pools by selecting pool-VOLs automatically
- Creating Dynamic Tiering or active flash pools by selecting pool-VOLs manually
- Creating a Dynamic Tiering or active flash pool by automatically selecting pool-VOLs
Prerequisites for creating pools
- Before you can create pools, the proper amount of shared memory must be installed, and you must have a V-VOL management area in shared memory. When shared memory is added, the V-VOL management area is automatically created. To add shared memory, contact your service representative.
- One pool-VOL with system area is defined for a pool. The priority of the pool-VOL with system area is assigned according to the drive type. The available capacity of the pool-VOL with system area is deducted from the management area capacity. The management area capacity stores the management information of program products that use the pool. If Dynamic Provisioning, Dynamic Tiering, or Thin Image is used on an open system, 4.2 GB is used as the management area in the pool-VOL with system area.
- When a pool is created, a pool-VOL with system area is assigned the priority shown in the following table. If multiple pool-VOLs of the same drive type exist, the priority of each is determined by the internal index of the storage system.
Priority
Drive type
1
SAS 7.2K
2
SAS 10K
3
SAS 15K
4
SSD
5
External volume