I have a server that is having some boot problems. I inserted the latest knoppix live CD and booted to a shell.  When I run sudo fdisk -l There is nothing returned. The command does not fail, it just does not find anything. I know there are two drives in the machine. Is there some other magical incantation that I need to use to see the drives? My goal is to run fsck on the drives to see if I can get them back to a working condition, or failing that, pull some of the data off of them. The original problem was the drive would not boot after a reset.