Red Hat GLOBAL FILE SYSTEM 5.0, Руководство администратора

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mapping) in a fixed format.
The following command shows the attributes of
lvol2
in
vg00
. If snapshot logical volumes have
been created for this original logical volume, this command shows a list of all snapshot logical
volumes and their status (active or inactive) as well.
lvdisplay -v /dev/vg00/lvol2
The
lvscan
command scans for all logical volumes in the system and lists them, as in the
following example.
# lvscan
ACTIVE '/dev/vg0/gfslv' [1.46 GB] inherit
4.8. Growing Logical Volumes
To increase the size of a logical volume, use the
lvextend
command.
After extending the logical volume, you will need to increase the size of the associated file
system to match.
When you extend the logical volume, you can indicate how much you want to extend the
volume, or how large you want it to be after you extend it.
The following command extends the logical volumne
/dev/myvg/homevol
to 12 gigabytes.
# lvextend -L12G /dev/myvg/homevol
lvextend -- extending logical volume "/dev/myvg/homevol" to 12 GB
lvextend -- doing automatic backup of volume group "myvg"
lvextend -- logical volume "/dev/myvg/homevol" successfully extended
The following command adds another gigabyte to the logical volume
/dev/myvg/homevol
.
# lvextend -L+1G /dev/myvg/homevol
lvextend -- extending logical volume "/dev/myvg/homevol" to 13 GB
lvextend -- doing automatic backup of volume group "myvg"
lvextend -- logical volume "/dev/myvg/homevol" successfully extended
As with the
lvcreate
command, you can use the
-l
argument of the
lvextend
command to
specify the number of extents by which to increase the size of the logical volume. You can also
use this argument to specify a percentage of the volume group, or a percentage of the
remaining free space in the volume group. The following command extends the logical volume
called
testlv
to fill all of the unallocated space in the volume group
myvg
.
Chapter 4. LVM Administration with CLI Commands
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