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

Creating Volumes
Types of Volume Layouts
Chapter 7 213
of this layout are increased performance by spreading data across
multiple disks and redundancy of data. “Striping Plus Mirroring
(Mirrored-Stripe or RAID-0+1)” on page 25.
• Layered Volume—A volume constructed from other volumes.
Non-layered volumes are constructed by mapping their subdisks to
VM disks. Layered volumes are constructed by mapping their
subdisks to underlying volumes (known as storage volumes), and
allow the creation of more complex forms of logical layout. For more
information, see “Layered Volumes” on page 35.
Examples of layered volumes are striped-mirror and
concatenated-mirror volumes.
NOTE The VERITAS Enterprise Administrator (VEA) terms a
striped-mirror volume as Striped-Pro, and a concatenated- mirror
volume as Concatenated-Pro.
A striped-mirror volume is created by configuring several mirrored
volumes as the columns of a striped volume. This layout offers the
same benefits as a non-layered mirrored-stripe volume. In addition it
provides faster recovery as the failure of single disk does not force an
entire striped plex offline. For more information, see “Mirroring Plus
Striping (Striped-Mirror, RAID-1+0 or RAID-10)” on page 26.
A concatenated-mirror volume is created by concatenating several
mirrored volumes. This provides faster recovery as the failure of a
single disk does not force the entire mirror offline.