Basically it was the same as the Fedora case with a few differences as the Ubuntu used LVM but not GPT.
Heres the situation at the start:
root@HQ-SV-COMS-TILE:~# uname -a
Linux HQ-SV-COMS-TILE 3.0.0-12-server #20-Ubuntu SMP Fri Oct 7 16:36:30 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
root@HQ-SV-COMS-TILE:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/HQ--SV--COMS--TILE-root
18G 17G 172M 99% /
udev 2.0G 4.0K 2.0G 1% /dev
tmpfs 793M 232K 793M 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 2.0G 0 2.0G 0% /run/shm
/dev/sda1 228M 24M 193M 11% /boot
root@HQ-SV-COMS-TILE:~# lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
root HQ-SV-COMS-TILE -wi-ao 17.74g
swap_1 HQ-SV-COMS-TILE -wi-ao 2.00g
root@HQ-SV-COMS-TILE:~# fdisk -l
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders, total 125829120 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0009138a
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 41940991 20719617 5 Extended
/dev/sda5 501760 41940991 20719616 8e Linux LVM
Disk /dev/mapper/HQ--SV--COMS--TILE-root: 19.1 GB, 19050528768 bytes
255 heads, 63 sectors/track, 2316 cylinders, total 37208064 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/HQ--SV--COMS--TILE-root doesn't contain a valid partition table
Disk /dev/mapper/HQ--SV--COMS--TILE-swap_1: 2143 MB, 2143289344 bytes
255 heads, 63 sectors/track, 260 cylinders, total 4186112 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/HQ--SV--COMS--TILE-swap_1 doesn't contain a valid partition table
Begin creating partitions inside the gaps
root@HQ-SV-COMS-TILE:~# fdisk /dev/sda
Command (m for help): p
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders, total 125829120 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0009138a
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 41940991 20719617 5 Extended
/dev/sda5 501760 41940991 20719616 8e Linux LVM
Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
p
Partition number (1-4, default 3): 3
First sector (499712-125829119, default 499712):
Using default value 499712
Last sector, +sectors or +size{K,M,G} (499712-501757, default 501757):
Using default value 501757
Command (m for help): n
Command action
l logical (5 or over)
p primary partition (1-4)
p
Selected partition 4
First sector (41940992-125829119, default 41940992):
Using default value 41940992
Last sector, +sectors or +size{K,M,G} (41940992-125829119, default 125829119):
Using default value 125829119
Command (m for help): p
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders, total 125829120 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0009138a
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 41940991 20719617 5 Extended
/dev/sda3 499712 501757 1023 83 Linux
/dev/sda4 41940992 125829119 41944064 83 Linux
/dev/sda5 501760 41940991 20719616 8e Linux LVM
Partition table entries are not in disk order
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table. The new table will be used at
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
root@HQ-SV-COMS-TILE:~# partprobe
root@HQ-SV-COMS-TILE:~# fdisk -l
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders, total 125829120 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0009138a
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 41940991 20719617 5 Extended
/dev/sda3 499712 501757 1023 83 Linux
/dev/sda4 41940992 125829119 41944064 83 Linux
/dev/sda5 501760 41940991 20719616 8e Linux LVM
Partition table entries are not in disk order
root@HQ-SV-COMS-TILE:~# lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
root HQ-SV-COMS-TILE -wi-ao 17.74g
swap_1 HQ-SV-COMS-TILE -wi-ao 2.00g
root@HQ-SV-COMS-TILE:~# vgextend HQ-SV-COMS-TILE /dev/sda3
Volume group "HQ-SV-COMS-TILE" successfully extended
root@HQ-SV-COMS-TILE:~# vgdisplay
--- Volume group ---
VG Name HQ-SV-COMS-TILE
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 19.76 GiB
PE Size 4.00 MiB
Total PE 5058
Alloc PE / Size 5053 / 19.74 GiB
Free PE / Size 5 / 20.00 MiB
VG UUID 01HVUX-Nffq-FDN5-dQam-qelF-wnlF-UMci63
root@HQ-SV-COMS-TILE:~# lvextend -L +5M /dev/HQ-SV-COMS-TILE/root
Rounding up size to full physical extent 8.00 MiB
Extending logical volume root to 17.75 GiB
Logical volume root successfully resized
root@HQ-SV-COMS-TILE:~# resize2fs /dev/HQ-SV-COMS-TILE/root
resize2fs 1.41.14 (22-Dec-2010)
Filesystem at /dev/HQ-SV-COMS-TILE/root is mounted on /; on-line resizing required
old desc_blocks = 2, new_desc_blocks = 2
Performing an on-line resize of /dev/HQ-SV-COMS-TILE/root to 4653056 (4k) blocks.
The filesystem on /dev/HQ-SV-COMS-TILE/root is now 4653056 blocks long.
root@HQ-SV-COMS-TILE:~# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/HQ--SV--COMS--TILE-root
18320140 17206020 183920 99% /
udev 2020284 4 2020280 1% /dev
tmpfs 811744 240 811504 1% /run
none 5120 0 5120 0% /run/lock
none 2029356 0 2029356 0% /run/shm
/dev/sda1 233191 23963 196787 11% /boot
root@HQ-SV-COMS-TILE:~# fdisk -l
Disk /dev/sda: 64.4 GB, 64424509440 bytes
255 heads, 63 sectors/track, 7832 cylinders, total 125829120 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0009138a
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 41940991 20719617 5 Extended
/dev/sda3 499712 501757 1023 83 Linux
/dev/sda4 41940992 125829119 41944064 83 Linux
/dev/sda5 501760 41940991 20719616 8e Linux LVM
Partition table entries are not in disk order
Disk /dev/mapper/HQ--SV--COMS--TILE-root: 19.1 GB, 19058917376 bytes
255 heads, 63 sectors/track, 2317 cylinders, total 37224448 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/HQ--SV--COMS--TILE-root doesn't contain a valid partition table
Disk /dev/mapper/HQ--SV--COMS--TILE-swap_1: 2143 MB, 2143289344 bytes
255 heads, 63 sectors/track, 260 cylinders, total 4186112 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/HQ--SV--COMS--TILE-swap_1 doesn't contain a valid partition table
root@HQ-SV-COMS-TILE:~# pvcreate /dev/sda4
Physical volume "/dev/sda4" successfully created
root@HQ-SV-COMS-TILE:~# vgextend HQ-SV-COMS-TILE /dev/sda4
Volume group "HQ-SV-COMS-TILE" successfully extended
root@HQ-SV-COMS-TILE:~# vgdisplay
--- Volume group ---
VG Name HQ-SV-COMS-TILE
System ID
Format lvm2
Metadata Areas 3
Metadata Sequence No 6
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 3
Act PV 3
VG Size 59.76 GiB
PE Size 4.00 MiB
Total PE 15298
Alloc PE / Size 5055 / 19.75 GiB
Free PE / Size 10243 / 40.01 GiB
VG UUID 01HVUX-Nffq-FDN5-dQam-qelF-wnlF-UMci63
root@HQ-SV-COMS-TILE:~# lvextend -L +40.01G /dev/HQ-SV-COMS-TILE/root
Rounding up size to full physical extent 40.01 GiB
Extending logical volume root to 57.76 GiB
Logical volume root successfully resized
root@HQ-SV-COMS-TILE:~# resize2fs /dev/HQ-SV-COMS-TILE/root
resize2fs 1.41.14 (22-Dec-2010)
Filesystem at /dev/HQ-SV-COMS-TILE/root is mounted on /; on-line resizing required
old desc_blocks = 2, new_desc_blocks = 4
Performing an on-line resize of /dev/HQ-SV-COMS-TILE/root to 15141888 (4k) blocks.
The filesystem on /dev/HQ-SV-COMS-TILE/root is now 15141888 blocks long.
root@HQ-SV-COMS-TILE:~# df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/HQ--SV--COMS--TILE-root
59615364 17214100 39375092 31% /
udev 2020284 4 2020280 1% /dev
tmpfs 811744 240 811504 1% /run
none 5120 0 5120 0% /run/lock
none 2029356 0 2029356 0% /run/shm
/dev/sda1 233191 23963 196787 11% /boot