I have an external hard drive (actually an internal hard drive with enclosure) which I want to be able to use with both my Apple and my Windows machine. I partitioned it using the Mac, leaving some free space for the Windows machine, but the Windows machine (running XP) doesn't recognise the partition at all -- just complains that it's uninitialised. Presumably, if I initialise it, that'll wipe out the Apple partition. (It's blank right now, so I'm happy to repartition if and as necessary.) What should I do?