Lvm

LVM (logical Volume Manager)

create 1 or more partition with partition code ‘8e’ [root@server3 ~]# fdisk -l Disk /dev/hda: 41.1 GB, 41110142976 bytes 255 heads, 63 sectors/track, 4998 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Device Boot Start End Blocks Id System /dev/hda1 * 1 1275 10241406 7 HPFS/NTFS /dev/hda9 1931 2057 1020096 83 Linux /dev/hda10 2058 2070 104391 8e Linux LVM /dev/hda11 2071 2083 104391 8e Linux LVM

/dev/hda10 & /dev/hda11:

is raw partition for lvm create physical volume with them [root@server3 ~]# pvcreate /dev/hda10 Physical volume "/dev/hda10" successfully created [root@server3 ~]# pvcreate /dev/hda10 Physical volume "/dev/hda11" successfully created After creating physical volume you have to create volume group with physical volume [root@server3 ~]# vgcreate vgo /dev/hda10 /dev/hda11 Volume group "vgo" successfully created [root@server3 ~]#

Create logical volume from volume group [root@server3 ~]# lvcreate -L 100M -n lv1 vgo Logical volume "lv1" created [root@server3 ~]# Apply the following command [root@server3 ~]# lvdisplay LV Name

/dev/vgo/lv1 (ensure that lv name is /dev/vgo/lv1)

Finally format the lvm “/dev/vgo/lv1’

[root@server3 ~]# mkfs.ext3 /dev/vgo/lv1 [root@server3 ~]# mount /dev/vgo/lv1 /mnt [root@server3 ~]# cd /mnt [root@server3 mnt]# ls lost+found [root@server3 mnt]#

Resizing logical volume: • •

lvextend lvreduce

Extend LVM: [root@server3 ~]# lvextend -L +20M /dev/vgo/lv1 Extending logical volume lv1 to 120.00 MB Logical volume lv1 successfully resized

[root@server3 ~]# e2fsck -f /dev/vgo/lv1 [root@server3 ~]# resize2fs /dev/vgo/lv1 resize2fs 1.39 (29-May-2006) Resizing the filesystem on /dev/vgo/lv1 to 122880 (1k) blocks. The filesystem on /dev/vgo/lv1 is now 122880 blocks long. [root@server3 ~]# mount /dev/vgo/lv1 /mnt [root@server3 ~]# df -h File system Size Used Avail Use% Mounted on /dev/hda8 12G 2.3G 8.6G 21% / /dev/hda7 130M 9.8M 113M 8% /boot /dev/mapper/vgo-lv1 117M 5.6M 105M 6% /mnt [root@server3 ~]#

Note: after applying lvdisplay command LVM Extend successfully done

Logical volume reduce (lvreduce)

[root@server3 ~]# umount /mnt [root@server3 ~]# e2fsck -f /dev/vgo/lv1 [root@server3 ~]# resize2fs /dev/vgo/lv1 20M [root@server3 ~]# lvreduce /dev/vgo/lv1 -L -100M

[root@server3 ~]# mount /dev/vgo/lv1 /mnt [root@server3 ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/hda8 12G 2.3G 8.6G 21% / /dev/hda9 965M 18M 898M 2% /home /dev/mapper/vgo-lv1 20M 4.6M 14M 25% /mnt [root@server3 ~]#

Try with the following: #lvremove #vgremove #pvremove #vgextend