Ubuntu 12.04.1 LTS
I wanted to test running fsck on root file system (ext4) on my home PC before I try to fix a real problem on my work server.
I booted into Linux recovery mode, and selected 'fsck - Check all file systems'.
fsck for util-linux 2.20.1
/dev/sdb5: 276147/151969160 files (0.2% non-contiguous), 2214857/60774919 blocks
then hung with no disk activity lights flashing. I left it for 10 minutes but no change. ENTER or Escape did nothing. Eventally I did Ctrl-C and it booted.
I only have 1 file system in /etc/fstab (other than proc & swap).
Is this supposed to happen? I searched for other posts in Ask Ubuntu about recovery mode, and from what I can tell, it should continue somehow after doing the fsck(s).
I did find link which seems to have same behavior but in that case the system was unbootable.
I also booted from 12.04.1 Live DVD and selected 'Test Linux' and manually ran
'sudo fsck /dev/sdb5' which ran for about the same time (10 seconds) and also didn't find any errors.
My system dual boots Linux & Windows 7 and Windows C: is an SSD.