Forgive me if this seems a little shallow, but it sounds as if the Zip disk isn't formatted (or not formatted vfat). Even if it worked before, in the hot humid weather (that much of the northern hemisphere is now experiencing) Zip disks can go bad. If there's no valuable data on the disk, why not go ahead and try to reformat it (in fact, why not format it as ext2)? If it was me, I'd try the command...
mke2fs /dev/hdd4 ...and if that doesn't produce a slew of error messages, I'd next try... mount /dev/hdd4 /mnt/zip - Miaoling __________________________________________________ Do You Yahoo!? Make international calls for as low as $.04/minute with Yahoo! Messenger http://phonecard.yahoo.com/