VERITAS Volume Manager 3.5 Administrator's Guide (September 2002)

Chapter 4, Creating and Administering Disk Groups

Adding a Disk to a Disk Group

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Note VxVM commands create all volumes in the default disk group, rootdg, if no

alternative disk group is speciﬁed using the -g option (see “Specifying a Disk

Group to Commands” on page 108). All commands default to the rootdg disk

group unless the disk group can be deduced from other information such as a disk

name.

A disk group must have at least one disk associated with it. A new disk group can be

created when you use menu item 1 (Add or initialize one or more disks) of

the vxdiskadm command to add disks to VxVM control, as described in “Adding a Disk

to VxVM” on page 65. Disks to be added to a disk group must not already belong to an

existing disk group.

You can also use the vxdiskadd command to create a new disk group, for example:

# vxdiskadd c1t1d0

where c1t1d0 is the device name of a disk that is not currently assigned to a disk group.

Disk groups can also be created by using the command vxdg init:

# vxdg init diskgroup diskname=devicename

For example, to create a disk group named mktdg on device c1t0d0:

# vxdg init mktdg mktdg01=c1t0d0

The disk speciﬁed by the device name, c1t0d0, must have been previously initialized

with vxdiskadd or vxdiskadm, and must not currently belong to a disk group.

Adding a Disk to a Disk Group

To add a disk to an existing disk group, use menu item 1 (Add or initialize one

or more disks) of the vxdiskadm command, as described in “Adding a Disk to

VxVM” on page 65.

You can also use the vxdiskadd command to add a disk to a disk group, for example:

# vxdiskadd c1t2d0

where c1t2d0 is the device name of a disk that is not currently assigned to a disk group.