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30 Understanding Veritas Volume Manager
How VxVM handles storage management
Figure 1-8 Example of three subdisks assigned to one VM Disk
Any VM disk space that is not part of a subdisk is free space. You can use free
space to create new subdisks.
VxVM release 3.0 or higher supports the concept of layered volumes in which
subdisks can contain volumes. For more information, see “Layered volumes” on
page 51.
Plexes
VxVM uses subdisks to build virtual objects called plexes. A plex consists of one
or more subdisks located on one or more physical disks. For example, see the
plex vol01-01 shown in Figure 1-9.
Figure 1-9 Example of a plex with two subdisks
VM disk with three subdisks
disk01
disk01-01
disk01-02
disk01-03
Subdisksdisk01-01 disk01-02 disk01-03
vol01-01
Plex with two subdisks
Subdisks
disk01-01 disk01-02
disk01-01 disk01-02