Create Rescue CD, you may already have one created so just mount this in edit settings#

• Download rescuecd from http://www.sysresccd.org
• Load into ISO
• Startup VM with ISO, in boot options ensure to boot into BIOS, set CD as primary boot device
• Restart VM and you should see a command line

Resize partitian table#

• enter or in 64 bit redhat type rescue64 (for keymap)
• fdisk -l
• fdisk /dev/sda
• p (to print)
• d (to delete)
• 2 (choose second one)
• n (to recreate)
• p (choose primary)
• 2 (choose second one)
• enter (to except new size)
• enter (to accept last one)
• p (show new size)
• t (change type)
• 2 (choose second one)
• 8e (to change patitian type code)
• p (to print shows 83 changed to 8e)
• w (to commit changes)

Scan for new or changed disks#

echo "- - -" > /sys/class/scsi_host/hostX/scan

Where X can be 0, 1, 2....

Resize physical volumne#

• pvdisplay /dev/sda2 (show old size)
• pvresize /dev/sda2
• pvdisplay /dev/sda2 (to show new size)

extend volume group#

• vgdisplay (show free space available, check "Free PE / Size" for $FreePESize parameter below)

Register Volumes#

• vgscan
• vgchange -ay (activate the lvm)

Extend Logical Volume#

• lvextend -l +$FreePESize /dev/VolGroup00/LogVol00 (the 64 is the param above)

or

• lvextend -l +$FreePESize /dev/VolGroup/lv_root (the 64 is the param above)

Resize File System#

• resize2fs /dev/VolGroup00/LogVol00

or

• resize2fs /dev/VolGroup/lv_root

Wait until this is finished.#

Sync buffer to disk#

• sync

Now wait 2 minutes for a small increase, or 5 minutes for a large increase.

• sync

Shutdown VM#

• shutdown -h now
• wait for machine to shutdown properly

• remove rescue cd from machine
• start machine as normal

If it fails when booting up, then run the fsck and click Y, then run this when OS starts from command line: resize2fs /dev/VolGroup00/LogVol00

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