http://www.uruk.org/orig-grub/errors.html<BR><BR><BR>16 : "Device string unrecognizable"<BR>This error is returned if a device string was expected, and the string ...
Do the same thing for your other drive, which will be either hdb or hdc depending on how you have things hooked up. Also useful is a 'ls -lR' listing of /boot and the contents of /boot/grub/menu.lst.