Hi,

My Ubuntu 10.10 just crashed(probably due to hardware error and in the end I was getting error like Unknown filesystem ..... grub> .. GRUB console before i could take some action) and i reinstalled the same version form USB stick. I had ubuntu installed in ext4 file system and I am also having the same filesystem in the same hard disk on different drive.

When I try to access my previous filesystem, i get error

Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sda6,
   missing codepage or helper program, or other error
   In some cases useful info is found in syslog - try
   dmesg | tail  or so

I had some important files in the previous volume, I don't know how to retrieve them.

And what are the chances that I would get the same outcome (hardware error)?

Please help me!