Veritas Volume Manager 4.1 Administrator's Guide (HP-UX 11i v3, February 2007)

Volume Layouts in VxVM

26 VERITAS Volume Manager Administrator’s Guide

Mirrored-Stripe Volume Laid out on Six Disks

See “Creating a Mirrored-Stripe Volume” on page 215 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 need a full 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

Vol um es ” on page 34 for more information.

As for a mirrored-stripe volume, a striped-mirror volume offers the dual benefits of

striping to spread data across multiple disks, while mirroring provides redundancy of

data. In addition, it enhances redundancy, and reduces recovery time after disk failure.

“Striped-Mirror Volume Laid out on Six Disks” on page 27 shows an example where a

striped-mirror volume is created by using each of three existing 2-disk mirrored volumes

to form a separate column within a striped plex.

Striped Plex

Mirror

Mirrored-Stripe

Volume

Column 0 Column 1 Column 2