You create a volume by specifying a parity group or a pool. To create an external volume, specify an external volume group, and to create a V-VOL, specify a pool.
When creating a pool from a parity group by using CCI, a pool-VOL is automatically created at the pool creation. Therefore, instead of creating a volume, create a pool (see Prerequisites for creating pools). The volumes are assigned to all available space in the parity group. The created volume can only be used as a pool-VOL.
A V-VOL can be created by using the VSP One Block Administrator GUI or the API.
Two types of volumes are used on VSP One Block 20:
- DRS-VOLs
- DRD-VOLs