Veritas Volume Manager 5.1 SP1 Administrator"s Guide (5900-1506, April 2011)

The disk that is specified by the device name, c1t0d0, must have been previously
initialized with vxdiskadd or vxdiskadm. The disk must not currently belong to
a disk group.
You can use the cds attribute with the vxdg init command to specify whether a
new disk group is compatible with the Cross-platform Data Sharing (CDS) feature.
In Veritas Volume Manager 4.0 and later releases, newly created disk groups are
compatible with CDS by default (equivalent to specifying cds=on). If you want to
change this behavior, edit the file /etc/default/vxdg and set the attribute-value
pair cds=off in this file before creating a new disk group.
You can also use the following command to set this attribute for a disk group:
# vxdg -g diskgroup set cds=on|off
Creating a disk group with an earlier disk group version
You may sometimes need to create a disk group that can be imported on a system
running an older version of Veritas Volume Manager. You must specify the disk
group version when you create the disk group, since you cannot downgrade a disk
group version.
For example, the default disk group version for a disk group created on a system
running Veritas Volume Manager 5.1SP1 is 160. Such a disk group cannot be
imported on a system running Veritas Volume Manager 4.1, as that release only
supports up to version 120. Therefore, to create a disk group on a system running
Veritas Volume Manager 5.1SP1 that can be imported by a system running Veritas
Volume Manager 4.1, the disk group must be created with a version of 120 or less.
To create a disk group with a previous version, specify the -T version option to
the vxdg init command.
For example, to create a disk group with version 120 that can be imported by a
system running VxVM 4.1, use the following command:
# vxdg -T 120 init newdg newdg01=c0t3d0
This creates a disk group, newdg, which can be imported by Veritas Volume
Manager 4.1. Note that while this disk group can be imported on the VxVM 4.1
system, attempts to use features from Veritas Volume Manager 5.0 or later releases
will fail.
Adding a disk to a disk group
To add a disk to an existing disk group, select Add or initialize one or more
disks from the main menu of the vxdiskadm command.
219Creating and administering disk groups
Adding a disk to a disk group