Veritas 4.1 Installation Guide (HP-UX 11i v3, February 2007)

• If the disk was previously in use by the LVM subsystem, you can preserve existing data
while still letting VxVM take control of the disk. This is accomplished using the conversion
utility vxvmconvert.
• If the disk was previously in use by the LVM subsystem, and you do not want to preserve
the data on it, use the LVM command, pvremove before attempting to initialize the disk
for VxVM.
Multiple disks on one or more controllers can be placed under VxVM control simultaneously.
Depending on the circumstances, all of the disks may not be processed the same way.
Creating and managing VxVM Logical objects
The virtual objects supported by VxVM include diskgroups, subdisks, plexes, volumes and
volume sets.
Diskgroups
Disk groups are named collections of disks that share a common configuration. Volumes are
created within a disk group and are restricted to using disks within that disk group.
You can do the following operations on disk groups:
• Displaying Information on Disk Groups
The vxdg command can be used to display information on disk groups.
— Displaying Information on Boot Disk Group
Display the currently defined system-wide boot disk group:
# vxdg bootdg
See vxdg (1M), for more information on the supported options.
— Displaying Information on Default Disk Group
Display the currently defined system-wide default disk group:
# vxdg defaultdg
See vxdg (1M), for more information on the supported options.
Alternatively you can also use the following command:
# vxprint -Gng defaultdg
See vxprint (1M), for more information on the supported options.
— Displaying Information on all Disk Groups
Display information on all existing disk groups:
# vxdg list
See vxdg (1M), for more information on the supported options.
— Displaying Information on Specific Disk Groups
Display information on a specific disk group:
# vxdg list <diskgroup>
See vxdg (1M), for more information on the supported options.
— Displaying Information on Free Space Available in Disk Groups
Display available free space information on the system:
# vxdg free
Setting up and managing VxVM 4.1 31