We need much more information. You say you can start Linux. So where does it go wrong.
What distro/version is it.
When does the error message appear.
What is the output of these commands:
Code:
sudo fdisk -l /dev/sda
sudo fdisk -l /dev/sdb
df -h
mount
It won't solve it but at least we know a little bit of your system after you give this answers. Now we are totally in the dark.
jlinkels