Veritas Volume Manager 5.0 Administrator's Guide (September 2006)

169Creating and administering disk groups

Handling disks with duplicated identifiers

when the disk group is imported. At least one of the cloned disks that are being imported

must contain a copy of the current configuration database in its private region.

You can use the following command to ensure that a copy of the metadata is placed on a

disk, regardless of the placement policy for the disk group:

# vxdisk [-g diskgroup] set disk keepmeta=always

Alternatively, use the following command to place a copy of the configuration database

and kernel log on all disks in a disk group that share a given tag:

# vxdg [-g diskgroup] set tagmeta=on tag=tagname nconfig=all \

nlog=all

To check which disks in a disk group contain copies of this configuration information, use

the

vxdg listmeta command:

# vxdg [-q] listmeta diskgroup

The -q option can be specified to suppress detailed configuration information from being

displayed.

The tagged disks in the disk group may be imported by specifying the tag to the vxdg

import command in addition to the -o useclonedev=on option:

# vxdg -o useclonedev=on -o tag=my_tagged_disks import mydg

If you have already imported the non-cloned disks in a disk group, you can use the -n and

-t option to specify a temporary name for the disk group containing the cloned disks:

# vxdg -t -n clonedg -o useclonedev=on -o tag=my_tagged_disks \

import mydg

See “Renaming a disk group” on page 173 for more information.

To remove a tag from a disk, use the

vxdisk rmtag command, as shown in the following

example:

# vxdisk rmtag tag=my_tagged_disks c2t67d0

For further information about the use of the vxdisk and vxdg commands to tag disks, and

handle duplicate UDIDs, see the

vxdisk(1M) and vxdg(1M) manual pages.

Sample cases of operations on cloned disks

The following sections contain examples of operations that can be used with cloned disks:

■ Enabling configuration database copies on tagged disks

■ Importing cloned disks without tags

■ Importing cloned disks with tags