VERITAS Volume Manager 3.5 Administrator's Guide (September 2004)

Understanding VERITAS Volume Manager
Volume Layouts in VxVM
Chapter 124
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 233 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