You want to use "mbrlabel wd1"


sleep 5 </dev/rwd1c && mbrlabel -w wd1 && mount -t msdos /dev/wd1a /mnt

You need all of that because the mbrlabel does not stay in memory very long so you have to use the info quickly.  In general that is how you would mount any partition of a DOS like fdisk structure, zip drives, CF micro-drives, etc.

djb