3.7.0 HP StorageWorks HP Scalable NAS File Serving Software administration guide - HP Scalable NAS 3.7 for Linux (AG513-96002, October 2009)

11 Manage hardware snapshots
HP Scalable NAS provides support for taking hardware snapshots of PSFS filesystems.
The subdevices on which the filesystems are located must reside on one or more
storage arrays that are supported for snapshots.
Snapshot support can be configured either on the Management Console “Configure
Cluster” window or with the mx config snapshot command. (See the HP Scalable
NAS File Serving Software installation guide for more information.) This procedure
creates a snapshot configuration file on each server.
Supported arrays
Hardware snapshots are supported on HP MSA2000, EVA, and XP storage arrays
and also supported on Engenio storage arrays.
HP MSA2000 storage arrays
To take hardware snapshots on HP StorageWorks 2000 Modular Smart Array
(MSA2000) storage arrays, the latest version of firmware must be installed on the
array controllers and the SSH Command Line Interface (CLI) service must be enabled
on the array controllers. Also, note that a MSA2000 snapshot license is required.
Only the filesystems located on Master Volumes (not Standard Volumes) are snapshot
capable. To locate MSA2000 array controller firmware or snapshot license
information, contact your HP representative.
IMPORTANT:
It is extremely important that all LUNs mapped to cluster hosts be mapped in the
same manner. If any are mapped explicitly to host ports, they all must be mapped
explicitly to host ports. If any are mapped to the "all hosts" default mapping, they
all must be mapped to the "all hosts" default mapping. Mapping cluster host LUNs
inconsistently and taking snapshots can cause problems where imported volumes
disappear and/or snapshot volumes fail to be imported.
HP Scalable NAS File Serving Software administration guide 213