VERITAS Volume Manager 4.1 Administrator's Guide

Understanding VERITAS Volume Manager
Volume Layouts in VxVM
Chapter 1 25
of the same disk or from another disk (for example, if the size of the plex
is increased). Columns can also contain subdisks from different VM
disks.
Figure 1-17 Example of a Striped Plex with Concatenated Subdisks per
Column
See “Creating a Striped Volume” on page 247 for information on how to
create a striped volume.
Mirroring (RAID-1)
Mirroring uses multiple mirrors (plexes) to duplicate the information
contained in a volume. In the event of a physical disk failure, the plex on
the failed disk becomes unavailable, but the system continues to operate
using the unaffected mirrors.
VM Disks
SU = Stripe Unit
Striped Plex
Column 1
Column 2
Column 3
disk02
disk02-01
disk02-02
disk03
disk03-01
su1
su2
su3
su4
su5
su6
disk01-01
disk01-02
disk01-03
disk01
.
.
.
disk01-01
disk01-02
disk01-03
disk02-01
disk02-02
disk03-01
Physical Disks
su2
su3
su5
su6
devname3
devname2
devname1
. . .
. . .
. . .
su4su1