I have had this problem for few days, i tried everything i could think of.
I suddenly got the message:
"A disk read error occurred,
press Alt+ctr+Del To restart"
First, i restored the BIOS settings to default, didn't work.
then i changed the HDD's cable, didn't work either.
Then i connected the HDD to another PC, I seem to see my partitions but without the sizes, the system stops when i try to open on of them!
I also tried bad-sector scanning, but it stops half way through!
at last, i tried booting from Ubuntu CD while my HDD is connected, but it took some time booting. So i tried booting without connecting the HDD and after it booted i connected it, but i didn't see my partitions!
it's a 1 TB, wd10ears. with less than 50 GB free space!
I NEED the DATA ON IT! IT"S VERY IMPORTANT!
any solutions guys?