Hitachi VSP G400 User Guide

For more information about storing snapshot data by splitting pairs, see
Splitting Thin Image pairs to store snapshot data on page 136.
• Split the Thin Image pair within the consistency group using consistency
group pair-split. Complete one of the following:
○ If you are not sharing Thin Image P-VOLs with Universal Replicator or
TrueCopy S-VOLs within a storage system, see
Workflow for storing
snapshot data or clone pairs in consistency groups on page 137.
○ If you are sharing Thin Image P-VOLs with Universal Replicator or
TrueCopy S-VOLs within a storage system, see Using consistency group
pair-split with shared volumes on page 138.
Splitting Thin Image pairs to store snapshot data
This topic explains how to split pairs. Splitting pairs stores snapshot data.
A maximum of 1,024 snapshots can be stored or pairs can be cloned from a
P-VOL. If you reach the maximum, delete the unneeded or unused
snapshots.
Note: If the amount of snapshot data in selected P-VOLs or the total number
of pairs in selected snapshot groups exceeds 37,768, an error message
appears when attempting to perform pair tasks.
Before you begin
• You must have the Storage Administrator (Local Copy) role.
• The Thin Image pair status must be "PAIR".
Procedure
1. In the Explorer pane, click Storage Systems, expand the storage
system tree, expand Replication, and then click Local Replication.
2. In the Local Replication window, select a P-VOL in the TI Root
Volumes tab or a snapshot group in the Snapshot Groups tab.
3. Click Operate TI Pairs.
4. In the TI Pairs window, specify the pair you want to split and then click
Split Pairs.
You can specify P-VOLs in Device Manager - Storage Navigator until the
total number of snapshots or clones reaches 32,768. You can also specify
snapshot groups until the total number of pairs reaches 32,768. For
cascaded pairs with layers, start with pairs at the higher layers.
5. Click Finish, and then confirm the settings.
6. Accept the default task name or enter a unique name.
You can enter up to 32 letters, numbers, and symbols, except the
following:
\ / : , ; * ? " < > |
136 Managing Thin Image Pairs
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