Hitachi VSP G400 User Guide

Item Requirement
For more information about deleting pools, see Deleting pools
on page 187.
Data pool warning threshold Value: Warning Threshold
Range: 20 - 95%, in 1% increments.
Default: 80%
Note: If you exceed the data pool warning threshold, a warning
is issued through a service information message (SIM) and an
SNMP trap reporting excessive pool usage.
For more information:
• About editing the data pool warning threshold, see
Editing
the data pool warning threshold on page 181.
• About checking alerts and checking the details of a SIM, see
the System Administrator Guide for your storage system.
• About SNMP traps, see the Hitachi SNMP Agent User Guide.
Thin Image consistency group requirements
The attributes of Thin Image consistency groups, such as the pair limit and
pair type, have usage requirements. Review these requirements before
creating consistency groups.
Item
Requirement
Consistency group ID Value: 0 to 2,047
With SI, SIz, and HTI, you can create up to 2,048 consistency
groups in a VSP G1000, G1500, and VSP F1500 storage system.
Manual assignment of a consistency group ID to an HTI pair
using the paircreate command:
• Specify a consistency group ID from 0 to 255.
Automatic assignment of a consistency group ID to an HTI pair
using the paircreate or raidcom add snapshot commands:
• Using the paircreate command, if a number is not specified,
an unassigned number from 0 to 255 is automatically
assigned.
1
• Using the raidcom add snapshot command, if a number is
not specified, an unassigned number from 0 to 2,047 is
automatically assigned.
2
Consistency group ID is displayed in the following windows:
• Consistency Groups tab in Local Replication window.
• Consistency Group Properties window.
Pair limit 8,192 pairs per consistency group.
Pair type
SI, SIz, and Thin Image pairs cannot be contained in a single
consistency group. For Thin Image consistency groups, only Thin
Image pairs can be defined in a group.
Snapshot and cloned pairs cannot be contained in a single
consistency group.
74 Thin Image system and planning requirements
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