Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Chapter 1, Understanding VERITAS Volume Manager
How VxVM Handles Storage Management
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A volume may be created under the following constraints:
◆ Its name can contain up to 31 characters.
◆ It can consist of up to 32 plexes, each of which contains one or more subdisks.
◆ It must have at least one associated plex that has a complete copy of the data in the
volume with at least one associated subdisk.
◆ All subdisks within a volume must belong to the same disk group.
Note You can use the VERITAS Intelligent Storage Provisioning (ISP) feature to create
and administer application volumes. These volumes are very similar to the
traditional VxVM volumes that are described in this chapter. However, there are
significant differences between the functionality of the two types of volume that
prevent them from being used interchangeably. Refer to the VERITAS Storage
Foundation Intelligent Storage Provisioning Administrator’s Guide for more information
about creating and administering ISP application volumes.
In “Example of a Volume with One Plex,” volume vol01 has the following
characteristics:
◆ It contains one plex named vol01-01.
◆ The plex contains one subdisk named disk01-01.
◆ The subdisk disk01-01 is allocated from VM disk disk01.
Example of a Volume with One Plex
vol01-01
vol01
Volume with One Plex
Plex with One Subdisk
disk01-01
vol01-01