It sounds like the openSUSE partitioning tool is encountering something unexpected with the partition table and/or disk geometries. Are you using Vista? Check your bios setup for a setting named something like disk "access mode" probably with the choices Auto, CHS, Large, and LBA; what is that set to? Then I need you to boot the DVD into Rescue System, login as root, and do:

fdisk -lu
I need to see the output back here. Note that this would be easier to do from a LiveCD.