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

The attribute mirror=ctlr specifies that disks in one mirror should not be on the
same controller as disks in other mirrors within the same volume:
# vxassist [-b] [-g diskgroup] make volume length \
layout=layout mirror=ctlr [attributes]
Note: Both paths of an active/passive array are not considered to be on different
controllers when mirroring across controllers.
The following command creates a mirrored volume with two data plexes in the
disk group, mydg:
# vxassist -b -g mydg make volspec 10g layout=mirror nmirror=2 \
mirror=ctlr ctlr:c2 ctlr:c3
The disks in one data plex are all attached to controller c2, and the disks in the
other data plex are all attached to controller c3. This arrangement ensures
continued availability of the volume should either controller fail.
The attribute mirror=enclr specifies that disks in one mirror should not be in
the same enclosure as disks in other mirrors within the same volume.
The following command creates a mirrored volume with two data plexes:
# vxassist -b make -g mydg volspec 10g layout=mirror nmirror=2 \
mirror=enclr enclr:enc1 enclr:enc2
The disks in one data plex are all taken from enclosure enc1, and the disks in the
other data plex are all taken from enclosure enc2. This arrangement ensures
continued availability of the volume should either enclosure become unavailable.
There are other ways in which you can control how volumes are laid out on the
specified storage.
See “Specifying ordered allocation of storage to volumes” on page 285.
Creating a RAID-5 volume
A RAID-5 volume requires space to be available on at least as many disks in the
disk group as the number of columns in the volume. Additional disks may be
required for any RAID-5 logs that are created.
Note: VxVM supports the creation of RAID-5 volumes in private disk groups, but
not in shareable disk groups in a cluster environment.
297Creating volumes
Creating a RAID-5 volume