Thanks to everyone who helped me sort out the proper mounting of my dos drives so that the group 'dos' could access them rwx. As many of you suspected, it was my inability to distinguish between umask and unmask which was causing my problem (I have the same problem with umount: I read an 'n' which isn't there). For some reason, I wasn't getting an error message though?
Anyway, I'm still having trouble with my /dev/null, which sometimes reverts to permissions: rwx______ when I reboot, causing X (and other) problems (it also did so after I had got X running today, possibly when I symlinked by ~/.netscape/cookies file to it). Could anyone please tell me why this happens, and how to stop it. Thanks in advance Rich