Changing The Parameters Of A Volume Group; Activating And Deactivating Volume Groups - Red Hat ENTERPRISE LINUX 5.1 - LVM ADMINISTRATION Manual

Cur LV
PE Size (KByte)
Total PE
Free PE
Allocated PE
PV UUID
If the physical volume is still being used you will have to migrate the data to another physical volume
using the pvmove command. Then use the vgreduce command to remove the physical volume:
The following command removes the physical volume /dev/hda1 from the volume group
my_volume_group.
# vgreduce my_volume_group /dev/hda1

4.3.6. Changing the Parameters of a Volume Group

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
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.

4.3.7. 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 4.4.4, "Changing the Parameters of a Logical Volume
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Changing the Parameters of a Volume Group
Groups",
Group", For information on activating
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