Veritas Volume Manager 5.0.1 Administrator's Guide, HP-UX 11i v3, First Edition, November 2009

Creating a concatenated-mirror volume
Note: You need a full license to use this feature.
A concatenated-mirror volume is an example of a layered volume which
concatenates several underlying mirror volumes. To create a concatenated-mirror
volume, use the following command:
# vxassist [-b] [-g diskgroup] make volume length \
layout=concat-mirror [nmirror=number]
Specify the -b option if you want to make the volume immediately available for
use.
See “Initializing and starting a volume” on page 303.
Creating a volume with a version 0 DCO volume
If a data change object (DCO) and DCO volume are associated with a volume, this
allows Persistent FastResync to be used with the volume.
See “How persistent FastResync works with snapshots” on page 69.
The version 0 data change object (DCO) and DCO volume layout was introduced
in VxVM 3.2. The version 0 layout supports traditional (third-mirror) snapshots,
but not full-sized instant snapshots, space-optimized instant snapshots nor DRL
configured within the DCO volume.
See “Determining the DCO version number” on page 321.
See “Version 0 DCO volume layout” on page 68.
See “Version 20 DCO volume layout” on page 68.
See “Creating a volume with a version 20 DCO volume” on page 293.
To perform fast resynchronization of mirrors after a system crash or reboot, you
must also enable dirty region logging (DRL) on a mirrored volume.
See “Adding a version 0 DCO and DCO volume” on page 405.
Note: You need a license to use the Persistent FastResync feature. If you do not
have a license, you can configure a DCO object and DCO volume so that snap
objects are associated with the original and snapshot volumes. However, without
a license, only full resynchronization can be performed.
See “How persistent FastResync works with snapshots” on page 69.
Creating volumes
Creating a volume with a version 0 DCO volume
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