The used pool capacity is the total amount of the mapped capacity and the reserved page capacity of each V-VOL. The mapped capacity is the total amount of pages that contain user data and the control information on each V-VOL. The reserved page is only available for a V-VOL for which the full allocation setting is enabled. The pool reserved page capacity is the total amount of pages reserved on each V-VOL.
The full allocation setting for a V-VOL cannot be changed on the following V-VOLs:
- Deduplication system data volumes
- DRS-VOLs
You can reclaim zero pages and release the appropriate pages if the status of all data in the pages in the V-VOL reads no logical records (referred to as zero page). The free capacity of a pool increases after the pages are released.