Hitachi VSP G400 User Guide

• Pairs 1 and 2 are Universal Replicator pairs.
• Pair 3 is a Universal Replicator pair for delta resync.
• Pairs 4, 5, and 6 are Thin Image pairs.
You must create pairs 1 and 2 before creating pairs 5 and 6, but pair 4 can
be created at any time.
Sharing Thin Image volumes with global-active device
You can use a Thin Image (HTI) P-VOL as a global-active device (GAD) P-VOL
or S-VOL.
The following tables list the relationship between Thin Image tasks and GAD
pair status.
Note: If you share GAD volumes with Thin Image volumes, stop I/O to a
volume before storing snapshot data. Snapshot consistency cannot be
guaranteed if you store snapshot data without stopping I/O to the volume.
For more information about GAD, see the Global-Active Device User Guide.
The following table lists the Thin Image tasks you can perform when the P-
VOL is shared with a GAD P-VOL.
GAD status
I/O
mode
HTI task
Create
pair
Store
snapshot
data
Restore
pair
Delete
snapshot
data
Delete
pair
COPY Mirror
(RL)
Yes Yes No Yes Yes
PAIR Mirror
(RL)
Yes Yes No Yes Yes
PSUS Local Yes Yes Yes Yes Yes
Block Yes Yes No Yes Yes
PSUE Local Yes Yes Yes Yes Yes
Overview of Thin Image 53
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