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

Creating a Volume on Specific Disks
204 VERITAS Volume Manager Administrator’s Guide
The vxassist command allows you to specify storage attributes. These give you control
over the devices, including disks, controllers and targets, which vxassist uses to
configure a volume. For example, you can specifically exclude disk mydg05:
# vxassist -b -g mydg make volspec 5g !mydg05
or exclude all disks that are on controller c2:
# vxassist -b -g mydg make volspec 5g !ctlr:c2
or include only disks on controller c1 except for target t5:
# vxassist -b -g mydg make volspec 5g ctlr:c1 !target:c1t5
If you want a volume to be created using only disks from a specific disk group, use the -g
option to vxassist, for example:
# vxassist -g bigone -b make volmega 20g bigone10 bigone11
or alternatively, use the diskgroup attribute:
# vxassist -b make volmega 20g diskgroup=bigone bigone10 bigone11
Note Any storage attributes that you specify for use must belong to the disk group.
Otherwise, vxassist will not use them to create a volume.
You can also use storage attributes to control how vxassist uses available storage, for
example, when calculating the maximum size of a volume, when growing a volume or
when removing mirrors or logs from a volume. The following example excludes disks
dgrp07 and dgrp08 when calculating the maximum size of RAID-5 volume that
vxassist can create using the disks in the disk group dg:
# vxassist -b -g dgrp maxsize layout=raid5 nlog=2 !dgrp07 !dgrp08
See the vxassist(1M) manual page for more information about using storage attributes.
It is also possible to control how volumes are laid out on the specified storage as described
in the next section “Specifying Ordered Allocation of Storage to Volumes.”