VxVM virtual objects are combined to build volumes. The virtual objects contained in volumes are VM disks, disk groups, subdisks, and plexes. VxVM virtual objects are organized in the following ways:
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
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 contains three VM disks which are used to create two volumes. Volume vol01 is simple and has a single plex. Volume vol02 is a mirrored volume with two plexes.
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 volume sets, to provide extended functionality.