[plug] Invalid superblock

[Daniel Pittman]

David Dartnall <darts at dialix.com.au> writes:

> Ubuntu Intrepid:
> I've been reading about how good KDE4 is, and attempted to install it.
> And now the system is unreachable.

[...]

> And gparted returns "input/output error on /dev/sdc"

You have a disk problem...

[...]

> darts at Sleaty:/dev$ dmesg | tail
>
> [ 1054.096881]         72 0b 14 00 00 00 00 0c 00 0a 80 00 00 00 00 00
> [ 1054.096897]         00 00 00 02
> [ 1054.096903] sd 1:0:1:0: [sdc] Add. Sense: Recorded entity not found
> [ 1054.096910] end_request: I/O error, dev sdc, sector 2
> [ 1054.096932] ata2: EH complete

It would help if you included the complete message regarding the fault,
not just the last few lines.

The short version, though, is that your disk is not responding properly
any longer, so nothing works.  This is a hardware fault.

Try unplugging and replugging all the cables to the disk, and see if
things improve.

Regards,
        Daniel

Otherwise, restore from backups to your new disk.