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LLE10200 : How to convert Ext2/Ext3 file system to Ext4 (in 9.04 Jaunty Jackalope).

Symptom:

--

Cause:

You want to convert your filesystem to Ext4.

Solution:

To convert your filesystem to Ext4 execute the following steps:

- Make sure you have Ubuntu 9.04 installed so that you have an Ext3 file-system.
- Back-up all of your valued data.
- To convert the partition, reboot from the real CD, and run this code:

sudo bash
tune2fs -O extents,uninit_bg,dir_index /dev/sda1
e2fsck -pf /dev/sda1

Note: In this example /dev/sda1 is the partition you want to convert.

- Next you must change Ext3 to Ext4 quite simply like below,

# /dev/sda1
UUID=XXXXXXXXXXXXXXXXXXXXXX  /           ext3
relatime,errors=remount-ro 0          1

Change the above code to:

# /dev/sda1
UUID=XXXXXXXXXXXXXXXXXXXXXX  /           ext4
relatime,errors=remount-ro 0          1

- You now MUST save the changes.


To convert ext2 to ext4 use this code instead:

sudo bashtune2fs -O extents,uninit_bg,dir_index,has_journal /dev/sda1
e2fsck -pf /dev/sda1


That's it, all you need to do is restart your computer. However, it is possible that you get an error 13 when restarting. This might be because Ubuntu did not like one of the updates. To fix this problem try the following:

sudo bashmount /dev/sda1 /mnt
grub-install /dev/sda --root-directory=/mnt --recheck


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