Item Requirements and restrictions
• The maximum size of a quorum disk is the maximum
limit for an external volume supported by Universal
Volume Manager: 4 TB.
• One external volume group must be mapped to one
external volume.
• Do not use a GAD quorum disk as a quorum disk for the
High Availability Manager function of the VSP, HUS VM,
or USP V/VM.
Alternate path software Alternate path software is required for the single-server GAD
configuration and the cross-path GAD configuration (two
servers).
Refer to the Hitachi Data Systems interoperability matrix:
http://www.hds.com/products/interoperability
Cluster software Cluster software is required for the server-cluster and cross-
path GAD configurations.
Refer to the Hitachi Data Systems interoperability matrix:
http://www.hds.com/products/interoperability
User interfaces • Command Suite : version 8.0.1 or later. HCS must be
connected to the primary and secondary storage
systems.
• Command Control Interface: version 01-32-03/00 or
later. CCI must be installed on the host connected to the
primary and secondary storage systems. For details, see
the Hitachi Command Control Interface Installation and
Configuration Guide.
The CCI command device is required on the primary and
secondary storage systems.
Interoperability requirements
This section describes the interoperability of global-active device (GAD) and
other Hitachi Virtual Storage Platform G1000 features.
Volume types that can be used for GAD
The following table lists the volume types on the Virtual Storage Platform
G1000 and specifies whether the volume can be used for GAD operations.
Volume type
Used as GAD P-
VOL?
Used as GAD S-
VOL?
Used as quorum
disk?
Dynamic Provisioning / Dynamic Tiering
Virtual volume Yes Yes No
Pool volume No No No
ShadowImage / Thin Image
P-VOL Yes Yes No
2-4
System requirements
Hitachi Virtual Storage Platform G1000 Global-Active Device User Guide
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