HP StorageWorks Clustered File System 3.6.0 Windows Storage Server Edition Administration Guide (403103-005, January 2008)

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Configure Dynamic Volumes
HP Clustered File System includes a CFS Volume Manager that you can
use to create, extend, recreate, or delete dynamic volumes, if you have
purchased the separate license. Dynamic volumes allow large filesystems
to span multiple disks, LUNs, or storage arrays.
Dynamic volumes can be deported from the cluster and later imported
back into the original cluster or into another cluster.
Overview
Basic and Dynamic Volumes
Volumes are used to store PSFS filesystems. There are two types of
volumes: dynamic and basic.
Dynamic volumes are created by the CFS Volume Manager. They can
include one or more disk partitions that have been imported into the
cluster. These entities are called subdevices. A single PSFS filesystem can
be placed on each dynamic volume. Additional subdevices can be added
to a dynamic volume as necessary, and the filesystem on the volume can
also be extended.
A basic volume consists of a single disk partition that has been imported
into the cluster. A PSFS filesystem is then created directly on the disk.
Basic volumes can be converted to dynamic volumes.