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HOWTO: Extend a partition on LVM.
11/07/08
02:48:50 pm, by richard 
, 154 words 
Categories: Ubuntu Linux, Filing Systems, Installation and Configuration, Logical Volume Manager LVM
HOWTO: Extend a partition on LVM.
First display the names of the logical volumes, so you know the name of the logical volume you are going to extend.
Follow up:
sudo lvdisplay
Te command above will tell you, if you named your lvm disks with a little for thought, which volume group the logical volume is in. Use te command below to find the VG and see how much free space is still left unallocated.
sudo vgdisplay
To extend a lv by adding a further say 40Gb
sudo lvextend -L+40G /dev/vg01/lv_data
and then resize the file system asuming you use reiserfs. If you use ext3 or other you may have to umount your partition to resize.
sudo resize_reiserfs -f /dev/mapper/vg01-lv_data
You can now check that the extension has taken correctly by using lvdisplay and finally using the disk free command
df -h /dev/mapper/vg01-lv_data
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg01-lv_data
220G 172G 50G 78% /backup
/dev/mapper/vg01-lv_data
220G 172G 50G 78% /backup
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