This article is from the the Brief Linux FAQ (BLFAQ) Maintained by Neil Zanella nzanella@ganymede.cs.mun.ca
You must ensure that you have an entry for your DOS partition in your /etc/fstab file resembling the line:
/dev/hda1 /dos vfat auto,user,rw 0 0
Once the line is there you can just issue the command "umount -a;mount -a" to mount your DOS partition under the /dos directory.
 
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