Capacity and space terminology

Allocated. The space that is used for chunklets. This includes chunklets that are used for logical drives, spares, and failed capacity.

Block (Persona). The space that is configured for HPE 3PAR Block Persona use.

File (Persona). The space that is configured for HPE 3PAR File Persona use.

Free. The portion of logical drive space that has not been reserved.

Grown. The user space or copy space that has been added to a virtual volume since it was created.

Raw reserved. The reserved space plus the RAID overhead.

Reclaimed. Indicates unused user space or copy space that has been reclaimed and made available to the storage system.

Reserved. The portion of logical drive space that has been mapped to virtual volumes, including the user space, copy space, and admin space of virtual volumes. It does not include the space for RAID overhead.

Savings (efficiency). The amount of free space in a thinly provisioned virtual volume. The free space in a thinly provisioned virtual volume represents the savings compared to the equivalent fully provisioned virtual volume.

System. The space that is used by the storage system for administrative functions.

Used. The portion of reserved space that has been used. When host applications write to virtual volumes, the affected user, copy, and admin spaces are counted as used space.

User space, copy space, admin space. Types of space in a virtual volume. Copy space is also known as snapshot space. Admin space contains snapshot metadata.

Virtual size. The size of a virtual volume that is displayed to host applications. The virtual size depends on RAID levels and does not have a correlation to physical drive space for the virtual volume.

Learn more: Storage virtualization overview, Virtual volumes overview, Common provisioning groups, Logical drives, Chunklets.