How to Extend LVM in Redhat 5.6

Question

I need to Extend the LVM on one server. This is the df -h result.

Filesystem            Size  Used Avail Use% Mounted on
/dev/cciss/c0d0p2      58G   26G   29G  48% /
/dev/mapper/VolGroup00-LogVol00
                      476G   86G  366G  19% /u001/app/oracle
/dev/cciss/c0d0p1     487M   17M  445M   4% /boot
tmpfs                  16G  730M   16G   5% /dev/shm

And I need to extend /dev/mapper/VolGroup00-LogVol00 from 475G to 700G. I have enough space to do this.

Any suggestions? Please mention all steps and prerequisites

Further Details

Before I go and apply this on actual server. I first plan to do this on a virtual machine. So I installed 5.6 on VirtualBox and assigned 25GB for installation.

df -h result:

And when I used the command

lvextend -L +500M /dev/mapper/VolGroup00-LogVoll00

its reply was “insufficient space”.

Although there is uninitialized space ready to be used.

Seems it didn't work. Please advice whats wrong here.

Output of vgs and pvs commands

Answer 1

First of all, check that you really have already space on your VG. In your example "Free PE" is 0, so you cannot extend any LV in it. If you do not have space on that VG, please add create new PEs with command pvcreate and add them to VG with command vgextend. Once you have enough space, just estend your LV with command lvextend and then resize your file system.

Answer 2

first make sure required size available or not on your physical volume using :

$ vgs

then try below to extend:

$ lvextend –L +500M /dev/mapper/VolGroup00-LogVol00
$ resize2fs /dev/mapper/VolGroup00-LogVol00