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

Understanding VERITAS Volume Manager

Volume Layouts in VxVM

Chapter 126

The ﬁgure, “Mirrored-Stripe Volume Laid out on Six Disks,” shows an

example where two plexes, each striped across three disks, are attached

as mirrors to the same volume to create a mirrored-stripe volume.

Figure 1-18 Mirrored-Stripe Volume Laid out on Six Disks

See “Creating a Mirrored-Stripe Volume” on page 234 for information on

how to create a mirrored-stripe volume.

The layout type of the data plexes in a mirror can be concatenated or

striped. Even if only one is striped, the volume is still termed a

mirrored-stripe volume. If they are all concatenated, the volume is

termed a mirrored-concatenated volume.

Mirroring Plus Striping (Striped-Mirror, RAID-1+0 or RAID-10)

NOTE You may need an additional license to use this feature.

VxVM supports the combination of striping above mirroring. This

combined layout is called a striped-mirror layout. Putting mirroring

below striping mirrors each column of the stripe. If there are multiple

subdisks per column, each subdisk can be mirrored individually instead

of each column.

NOTE A striped-mirror volume is an example of a layered volume. See “Layered

Volumes” on page 35 for more information.

Striped Plex

Mirror

Mirrored-Stripe

Volume

Column 1 Column 2 Column 3