Hitachi VSP G400 System Administration Guide

create the parity group are no longer in use. You can delete the parity
group if you want to reconfigure the storage system with some other
RAID configuration or simply decommission the array.
Note: The following parity groups cannot be deleted:
• Parity groups on VSP G1000, VSP G1500, or VSP F1500
storage systems.
• Parity groups that contain NAS boot volumes.
○ To enable accelerated compression on parity groups, click Enable
Compression on Parity Groups.
Compression can be enabled for unencrypted parity groups that were
created using FMD DC2 disks. The parity groups must also be in IN_USE
status.
Note: The IN_USE status means that the parity group is in a
pool. You can create a pool on an existing parity group that was
created using FMD DC2 drives. Then identify the parity group in
the detail page for the pool and enable compression in the Parity
Groups page.
Parity groups that contain NAS boot volumes cannot be
compressed.
After compression is enabled, the status of the parity group is IN_USE.
• Click the plus sign (+) to create a new parity group.
Note: Parity groups on a VSP G1000, VSP G1500, or VSP F1500
storage systems are created outside Storage Advisor by an
authorized service representative.
• Use the filters to view the status of parity groups. Click a filter to apply it
and click it again to remove it.
○ AVAILABLE: Parity group is not being used for any storage pools. It is
available for pool creation.
○ AVAILABLE_PHYSICAL: Parity group is not being used for any storage
pools. Compression is enabled on the parity group and physical capacity
of the parity group is available for pool creation. Not applicable to parity
groups that are not enabled for compression.
○ FORMATTED: At least one of the pool volumes in the parity group is
being formatted. The full format takes longer than a quick format
because the service processor fully scans the hard drive.
○ QUICK_FORMATTING At least one of the pool volumes in the parity
group is being formatted using the quick format method. To make the
formatting process quick, the drive is not fully checked, the files are still
there, and the volume could be re-built to gain access to the files again.
Configuring the storage system 75
System Administrator Guide for VSP Gx00 models and VSP Fx00 models

Hitachi VSP G400 Specifications

General

Brand	Hitachi
Model	VSP G400
Category	Storage
Language	English