Try some googling about ubuntu and badblocks Preferrably use it on the disk device, not the partitions themselves. i.e. if you see /dev/xxx, /dev/xxx1, /dev/xxx2, you have the xxx disk with partitions xxx1 and xxx2. You can easily identify them using the palimpsest disk utility that lies around in the menu. Of course you boot from the CD and run it as live CD. Paul