VERITAS Volume Manager 4.1 Administrator's Guide

Understanding VERITAS Volume Manager
Volume Layouts in VxVM
Chapter 124
Striping continues for the length of the columns (if all columns are the
same length), or until the end of the shortest column is reached. Any
space remaining at the end of subdisks in longer columns becomes
unused space.
Figure 1-16, “Example of a Striped Plex with One Subdisk per Column,”
shows a striped plex with three equal sized, single-subdisk columns.
There is one column per physical disk. This example shows three
subdisks that occupy all of the space on the VM disks. It is also possible
for each subdisk in a striped plex to occupy only a portion of the VM disk,
which leaves free space for other disk management tasks.
Figure 1-16 Example of a Striped Plex with One Subdisk per Column
Figure 1-17, “Example of a Striped Plex with Concatenated Subdisks per
Column,” illustrates a striped plex with three columns containing
subdisks of different sizes. Each column contains a different number of
subdisks. There is one column per physical disk. Striped plexes can be
created by using a single subdisk from each of the VM disks being
striped across. It is also possible to allocate space from different regions
VM Disks
Physical Disks
Column 2
Column 3
Striped Plex
disk01
disk01-01
disk03
disk03-01
disk02
disk02-01
SU = Stripe Unit
su1
su2
su3
su4
su5
su6
su2
su3
su5
su6
Column 1
.
.
.
disk01-01
disk02-01
disk03-01
devname3
devname2
devname1
. . .
. . .
. . .
su4su1