VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

Device Discovery
12 VERITAS Volume Manager Administrator’s Guide
Example of a Volume with Two Plexes
Each plex contains an identical copy of the volume data. For more information, see
“Mirroring (RAID-1)” on page 21.
Volume vol06 has the following characteristics:
◆ It contains two plexes named vol06-01 and vol06-02
◆ Each plex contains one subdisk
◆ Each subdisk is allocated from a different VM disk (disk01 and disk02)
Combining Virtual Objects in VxVM
VxVM virtual objects are combined to build volumes. The virtual objects contained in
volumes are VM disks, disk groups, subdisks, and plexes. VERITAS Volume Manager
objects are organized as follows:
◆ VM disks are grouped into disk groups
◆ Subdisks (each representing a specific region of a disk) are combined to form plexes
◆ Volumes are composed of one or more plexes
The figure, “Connection Between Objects in VxVM”, shows the connections between
VERITAS Volume Manager virtual objects and how they relate to physical disks. The disk
group consists of two VM disks: disk01 has a volume with one plex and two subdisks,
and disk02 has a volume with one plex and a single subdisk
vol06
disk02-01
vol06-02
disk01-01
vol06-01
Volume