When you create a pool, you select the pool volumes (pool-VOLs) for the pool and set options such as the warning and depletion thresholds for the pool. You can also enable options such as V-VOL protection.
A pool cannot be created from a parity group by using VSP Block Storage REST API. To create a pool in a parity configuration, use CCI.
Before the pool creation, verify the parity group ID of the parity group containing the pool to be created, the pool ID to be used, and the type of pool to be created.
Create a pool by specifying a parity group that contains no LDEVs. The LDEV creation, LDEV formatting, and pool-VOL addition are automatically performed. There is no need to create the LDEV in advance.
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.
- When creating a pool by specifying a parity group in CCI, specify the ID of a parity group whose emulation type is 3390-V.
- One pool-VOL with system area is defined as a system pool-VOL. 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 the software products that use the pool. For Dynamic Provisioning for Mainframe, 3.8 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 SSD 2 External volume