Was this converted from ext3 or created originally as ext4? [by TrevorH]
That all looks correct to me. Did resize2fs run successfully with no errors? Did you try it again? This volume is ext3 and not ext4? On 5.x to use ext4 you'd need to use resize4fs not resize2f... [by TrevorH]
I have seen that Ubuntu 11.10 is offering Ext4 as default file system. As I have googled some time on ext4 and found that ext3 is quite stable that ext4 as it still has some bugs.
Even the Ubuntu Documentation is referring Ext3. Link
So, I would like to know whether Ext4 is currently stable on 11.10 or not than Ext3