From: jimj@miller.cs.uwm.edu (James Jegers)
Newsgroups: comp.unix.bsd
Subject: MS-DOS mounting DOCS
Date: 22 Jan 1993 00:05:28 GMT
Organization: University of Wisconsin - Milwaukee
Distribution: world
NNTP-Posting-Host: 129.89.9.13

     Hope you enjoy the DOC..


  386BSD now support DOS filesystems.  There are two
  ways in which you may read a DOS filesystem.

   1.  Via the mtools commands which simulate the DOS commands
       such as mdir, mcopy, mcd, mmkdir, etc.

   2.  Or you can mount the DOS filesystem just like a UNIX
       filesystem.

-------------------------------------------------------------------------
   Be careful with the PCFS part in your kernel.  It's not the
   smartest of things it doesn't do that much error checking.
   For instance:
      If I try to mount certain ISO CD's as PCFS, my machine locks 
	up shortly after.
      If I try to mount a partion as PCFS which isn't MSDOS, (or is
      random sectors on the disks) the magic nicely panics and reboots.
-------------------------------------------------------------------------

  To read and write DOS floppies,  You must, 

   1.  Make the floppy minor devices in /dev by running the MAKEDEV script.
       cd /dev; sh MAKEDEV fd0 fd1

   2.  If you wants to use the mtools,

          Then compile the mtools package which came with 386bsd. The 
	  devices.c file should already be setup for use with 386bsd.

	  Insert the floppy and run  mdir a: or mdir b:
	  to get a directory..  
	  Use the other m?? commands for the other functions.

   3.  If you wish to mount the DOS floppy,

	  Install the PCFS filestems type into your kernel and
	  recompile your kernel via the instructions given with
	  PCFS.

	  mount the DOS floppy to a directory,
	  mount -t pcfs /dev/fd0d /mnt 

	  fd0d for the floppy #1, fd1d for floppy #2.


  To read and write to you DOS partition on your Hard Drive, you must,

   1.  Set up a DOS partition on your hard drive following the instruction
       from the 386BSD installation manual.

   2.  Get the fdisk command(ref.tfs.com, and elsewhere) and run it to
       find the starting sector/size of your DOS partition, 

       fdisk /dev/rsd0d     or   fdisk /dev/rwd0d

       The data for partition 0 is:
       sysid 6,(Primary 'big' DOS (> 32MB))
	   start 32, size 819168 (399 Meg), flag 80
	   beg: cyl 0/ sector 1/ head 1;
	   end: cyl 399/ sector 32/ head 63
       The data for partition 3 is:
       sysid 165,(386BSD)
           start 819200, size 1259520 (615 Meg), flag 0
           beg: cyl 400/ sector 1/ head 0;
           end: cyl 1014/ sector 32/ head 63

       Looking at above the DOS partition starts at sector 32 and 
       is 819168 sectors big.

  3.  Edit your disklabel to have a partition which is the same as
      your dos partition. 

      disklabel -e /dev/rsd0d

      Make the partition name E or F, etc.

	WARNING:  Do not make the DOS partition the C or D partition unless
	the DOS partition covers the entire drive!  Partition C is
	the whole UNIX partition and partition D is the whole drive.

      c: 1259520   819200    unused        0     0         # (Cyl.  642*- 1630*)
      d: 2113950        0    unused        0     0         # (Cyl.    0 - 1657)
      f:  819168       32     MSDOS                        # (Cyl.    0*- 642*)

   4.  If you are using mtools, 

	modify the devices.c file to include a drive letter which uses
	this new partition.

  	 {'C', "/dev/rsd0f", 0L, 16, 0, (int (*) ()) 0, 0, 0, 0},

        Someone did post a patch to make mtools automatically find the
	DOS partition, but I couldn't get it to work, so I do it this way.

        You can then run the mtools commands to read/write from the hard
	drive.  ie.. mdir c:   mcopy c:autoexec.bat .

   5.  If you wish to mount the filesystem under UNIX.
		
	  Install the PCFS filesystem type into your kernel and
	  recompile your kernel via the instructions given with
	  PCFS.
	  There has also been some patches to PCFS to support
	  the DOS hard drive better.

	  mount the DOS hard drive partition just like the floppy,

	  mount -t pcfs /dev/sd0f /mnt

			^^^^^^^^^  use the partition letter which you created
				   above.
------------------------------------------------------------------------------

  I hope this helps.  PS. I'm not responsible for anything that you do,
  I just wrote this to try to help out.

     ______________________________________________________________
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Newsgroups: comp.unix.bsd