Increase LVM Volume

This is how I did it on a VMWare Machine but the procedure should be the same for a phisical machine:

First off, VMWare, like many other hypervisors, allows to create a second HDD on the fly while the vm is running.

Once that was done, login into the server and:

# echo “- – -” > /sys/class/scsi_host/host#/scan

partprobe should also do the trick

Just to see that the new disk is available use:

# fdisk -l

In this case it was /dev/sdb

create a new partition with

# fdisk /dev/sdb

press n and then w

Format the new partition:

# mkfs.ext3 /dev/sdb1

list the volume groups:

# vgs

add new physical volume

# pvcreate /dev/sdb1

extend the default volume group from the vgs command

# vgextend VolGroup /dev/sdb1

check to see pv and vg has another volume with:

# vgs

And list logical volumes

# lvdisplay

extend my / volume by the entire size of /dev/sdb1

# lvextend /dev/VolGroup/lv_root/dev/sdb1

resize filesystem to match vol size increase

# resize2fs /dev/VolGroup/lv_root

(requires a 2.6 kernel to resize while fs running)