https://halfface.se/wiki/index.php?action=history&feed=atom&title=Lvm
Lvm - Revision history
2026-04-19T07:27:25Z
Revision history for this page on the wiki
MediaWiki 1.43.1
https://halfface.se/wiki/index.php?title=Lvm&diff=14075&oldid=prev
Ekaanbj: /* lvs */
2022-04-27T15:34:17Z
<p><span class="autocomment">lvs</span></p>
<p><b>New page</b></p><div>==Create partition.==<br />
fdisk /dev/sda1<br />
n<br />
t<br />
Partition type 8e<br />
<br />
==Create physiscal volume.==<br />
pvcreate /dev/sda3<br />
pvdisplay<br />
<br />
==Create volume group.==<br />
vgcreate VolGroup00 /dev/sda1<br />
vgdisplay<br />
<br />
==create logical volume==<br />
Create logical volume. Create a logic volume spanning 3 disks, each stripe 256kb, 1,5TB, called LogVol00 in VolGroup00<br />
lvcreate -i3 -I 256 -L1500000 -n LogVol00 VolGroup00<br />
lvcreate -L 5.12G -n LogVol02 VolGroup00 # Create logical volume of 5.12G on Volume group VolGroup00.<br />
lvcreate --name apps --size 30G vg0<br />
==list volume groups==<br />
lvdisplay<br />
<br />
==Format logical volume.==<br />
mkfs.reiserfs /dev/VolGroup00/LogVol02<br />
<br />
==Extend a resizerfs logical volume.==<br />
lvextend -L+70G /dev/VolGroup00/LogVol00<br />
resize_reiserfs -f /dev/VolGroup00/LogVol00<br />
<br />
==Extend a ext3 partition.==<br />
lvextend -L +6g /dev/vgroot/root.fs<br />
resize2fs /dev/vgroot/root.fs<br />
<br />
==Shrink ext2/3 partition.==<br />
umount /data # umount /data<br />
resize2fs /dev/VolGroup00/LogVol00 10G # Resize file system to 10GB.<br />
lvreduce -L 10G /dev/VolGroup00/LogVol00 # Resize logical volume to 1GB.<br />
e2fsck -f /dev/VolGroup00/LogVol00 # Check filesystem.<br />
mount /data # mount /data<br />
<br />
==Shrink reizerfs volume. (not tested yet)==<br />
umount /data # unmount /data<br />
resize_reiserfs -s 10G /dev/VolGroup00/LogVol00 # Resize file system to 10GB.<br />
lvreduce -L 10G /dev/VolGroup00/LogVol00 # Resize logical volume to 1GB.<br />
vgreduce vg0 /dev/vdb1<br />
mount -t reiserfs /data<br />
<br />
resize_reiserfs -s-150M /dev/VolGroup/LogVol00<br />
lvreduce -L-150M /dev/VolGroup00/LogVol00<br />
<br />
==Create device-mapper in /proc/misc==<br />
modprobe dm-mod<br />
<br />
==Activate Volume Group.==<br />
lvm vgchange -a y VolGroup00<br />
<br />
==Create a snapshot volume.==<br />
modprobe dm-snapshot<br />
lvcreate --snapshot --size 128M --name LogVol02snap /dev/VolGroup00/LogVol02<br />
<br />
==Create device maps from partition tables==<br />
kpartx -av /dev/VolGroup00/LogVol02<br />
<br />
==Copy logical volume.==<br />
dd if=/dev/VolGroup00/LogVol02 of=/dev/VolGroup00/LogVol03 bs=64M<br />
<br />
==Extend logical volume with disk.==<br />
vgextend vgroot /dev/sdb<br />
<br />
==Check for Free PE / Size. First we need to enlarge the logical volume.==<br />
vgdisplay<br />
<br />
==Now we enlarged the volume but not the filesystem.==<br />
lvextend -l +<number of extents> /dev/<volume group>/<logical volume><br />
<br />
==This will grow the filesystem on-line.==<br />
resize2fs /dev/<volume group>/<logical volume><br />
<br />
==When extending partition by deleting and adding partition.==<br />
pvchange -x /dec/sda<br />
==Logical volume information==<br />
lvs<br />
You should see more than the standard disks.<br />
LV VG Attr LSize Origin Snap% Move Log Copy% Convert<br />
lvdata287 vgdata287 -wi--- 500.00G <br />
lvdata306 vgdata306 -wi--- 50.00G <br />
lvdata370 vgdata370 -wi--- 20.00G <br />
lvdata371 vgdata371 -wi--- 600.00G <br />
lvlog287 vglog287 -wi--- 100.00G <br />
lvlog306 vglog306 -wi--- 20.00G <br />
lvlog370 vglog370 -wi--- 10.00G <br />
lvlog371 vglog371 -wi--- 20.00G <br />
opt.fs vgroot -wi-ao 12.00G <br />
root.fs vgroot -wi-ao 4.00G <br />
swap.vol vgroot -wi-ao 2.00G <br />
var.fs vgroot -wi-ao 8.00G<br />
<br />
==remove a pv==<br />
lvremove vg2<br />
vgremove vg2<br />
pvscan<br />
pvremove /dev/xvdg<br />
==remove logical volume and volume group when disk has been removed==<br />
dmsetup info<br />
dmsetup remove vg04-vz<br />
==vgs==<br />
Look to see if there is any available space.<br />
vgs<br />
<br />
==lvs==<br />
Display information about logical volumes<br />
lvs<br />
Type and stripes<br />
lvs -o+lv_layout,stripes<br />
lvs -a -o+lv_layout,lv_role,stripes,devices<br />
<br />
==add snapshot volume==<br />
lvcreate -n root_SNAP -s vg0/root -L 1500M<br />
==remove snapshot volume==<br />
lvremove -f /dev/vg0/root_SNAP<br />
=pvresize=<br />
Increase size of pv.<br />
pvresize /dev/sdc<br />
=pvs=<br />
List usage of pv<br />
[[Category:Applications]]<br />
[[Category:Unix]]<br />
[[Category:Storage]]</div>
Ekaanbj