Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

26 Understanding Veritas Volume Manager
How VxVM handles storage management
Figure 1-5 Connection between objects in VxVM
The various types of virtual objects (disk groups, VM disks, subdisks, plexes and
volumes) are described in the following sections. Other types of objects exist in Veritas
Volume Manager, such as data change objects (DCOs), and cache objects, to provide
extended functionality. These objects are discussed later in this chapter.
Disk groups
A disk group is a collection of disks that share a common configuration, and which are
managed by VxVM (see “VM disks” on page 27). A disk group configuration is a set of
records with detailed information about related VxVM objects, their attributes, and their
connections. A disk group name can be up to 31 characters long.
disk02
vol01
Disk group
VM disks
Physical disks
Plexes
Volumes
Subdisks
devname1
vol02
vol02-01 vol02-02
vol01-01 vol02-01 vol02-02
vol01-01
disk01-01 disk02-01 disk03-01
devname3 devname2
disk01-01 disk02-01 disk3-01
disk01
disk01-01
disk03
disk03-01disk02-01