Red Hat GLOBAL FILE SYSTEM 5.0, Руководство администратора

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There are several volume group parameters that you can change for an existing volume group
with the
vgchange
command. Primarily, however, this command is used to deactivate and
activate volume groups, as described in Section 3.7, “Activating and Deactivating Volume
Groups” ,
The following command changes the maximum number of logical volumes of volume group
vg00
to 128.
vgchange -l 128 /dev/vg00
For a description of the volume group parameters you can change with the
vgchange
command,
see the
vgchange
(8) man page.
3.7. Activating and Deactivating Volume Groups
When you create a volume group it is, by default, activated. This means that the logical volumes
in that group are accessible and subject to change.
There are various circumstances for which you you need to make a volume group inactive and
thus unknown to the kernel. To deactivate or activate a volume group, use the
-a
(
--available
) argument of the
vgchange
command.
The following example deactivates the volume group
my_volume_group
.
vgchange -a n my_volume_group
If clustered locking is enabled, add ’e’ to activate or deactivate a volume group exclusively on
one node or ’l’ to activate or/deactivate a volume group only on the local node. Logical volumes
with single-host snapshots are always activated exclusively because they can only be used on
one node at once.
You can deactivate individual logical volumes with the
lvchange
command, as described in
Section 4.4, “Changing the Parameters of a Logical Volume Group” , For information on
activating logical volumes on individual nodes in a cluster, see Section 8, “Activating Logical
Volumes on Individual Nodes in a Cluster” .
3.8. Removing Volume Groups
To remove a volume group that contains no logical volumes, use the
vgremove
command.
# vgremove officevg
Volume group "officevg" successfully removed
Chapter 4. LVM Administration with CLI Commands
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