Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

38 Understanding Veritas Volume Manager

Volume layouts in VxVM

Figure 1-15 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 1-15 Example of a striped plex with one subdisk per column

Figure 1-16 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 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.

Subdisks

Physical disks

Column 2

Striped plex

Stripe units

su2

su3

su5

su6

Column 0

devname3

devname2

devname1

su4su1

disk01

disk03disk02

disk03-01

disk01-01

VM disks

su1 su2

su3

su4 su5 su6

Column 1

disk03-01

disk01-01

disk02-01

disk03-01

disk01-01

disk02-01