Hitachi VSP G400 User Guide

You cannot release definitions of V-VOLs if the V-VOLs are being used as Thin
Image secondary volumes; you must first release the Thin Image pairs that
are using the V-VOLs.
How Thin Image pairs are created
When creating a Thin Image pair, you need to specify the pool to be used for
the pair. If multiple Thin Image pairs share the same primary volume, the
pairs must also share the same pool. For example, if you specify three
secondary volumes for one primary volume, you must specify the same pool
for the three Thin Image pairs.
If you release a Thin Image pair, the volume status becomes SMPL.
Immediately after a volume becomes SMPL, you cannot use the volume to
create a Thin Image pair. If you want to create Thin Image pairs using SMPL
volumes, you should wait for a while before creating the pairs. The wait time
required depends on your system environment.
Related tasks
•
Creating Thin Image pairs using Device Manager - Storage Navigator on
page 130
• Viewing pair properties on page 160
Using snapshot pairs (not cascaded)
The following figure shows how snapshot pairs are used when they are not
cascaded.
Data in the P-VOL is backed up one time every day. The P-VOL can be
restored using the S-VOL if a logical failure occurs during data update or if
there is a virus in the P-VOL.
Overview of Thin Image 29
Hitachi Thin Image User Guide for Hitachi Virtual Storage Platform G Series and F Series

Hitachi VSP G400 Specifications

General

Brand	Hitachi
Model	VSP G400
Category	Storage
Language	English