I think that I have resolved this problem. When I downloaded a free utility called Data Lifeguard for the Western Digital drive that I have, it warned me that support for large drives was not enabled for my w2k as soon as I finished the installation of it. It said that this is needed for drives over 137GB in size. It made a change to the w2k registry and rebooted and ... volia ... w2k is happy as a clam after adding a partition via Knoppix fdisk. <sigh> I would imagine that XP would have this enabled by default. But a word of warning to those who have installed w2k from old media and have patched it up to the latest and greatest Service Pack ... make sure you download a utility from your disk manaufacturer to enable this switch manually since the updating process does not do this. However, this does represent a ticking timebomb for curious people wanting to setup a dual-boot w2k-linux box. They may find themselves with a dead w2k system after things get partitioned up during their Linux install with no easy way to install and run this magic utility that puts the right entries into their registry to prevent w2k from barfing. ... and there doesn't seem to be anyway for anaconda to work around this. Maybe something for the wiki or release notes. I'll put in a bugzilla and see if it gets any attention. Anyways ... thanks to the people who helped me narrow things down. I think that I learned a lot more about partition tables than I ever wanted to know :] /Mike