I have EXACTLY the same problem with Knoppix 2003-9/22. It autodetects that I have four partitions, but can not mount them via command line or GUI with any combo of mount --parameters. When I run fdisk from inside Knoppix, it says I have no partition table. I have a SiS 5513 Dual IDE controller, old Western Digital HD. Works fine with RH9, MDK9.0, SuSE 6.2, SuSE 8.0, VectorLinux, etc. If anyone can help that would be great!