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STAC FAX Index #3302

	    Backing out of a DOS 6 upgrade with Stacker installed.
		      
		      (Applies to Stacker 2.0 & 3.0)
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Background.

After installing Microsoft DOS 6, you want to revert to your previous version 
of DOS, but because Stacker was installed DOS 6 did not allow you to make 
an uninstall disk.

Procedure.

Both Procedures require that you have a boot disk from the previous version 
of DOS, with SYS.COM on it.

     Case #1 You have not deleted the "OLD_DOS.1" directory.

1.      Remove the "read-only" attributes on the DOS 6 COMMAND.COM, on both 
	the Stacker drive and Host drive, in both the root and DOS 
	directories.

2.      Start the system with the previous DOS's startup disk.

3.      From the Startup diskette re-sys the Host boot drive.

4.      Edit the CONFIG.SYS on the host drive to disable SSWAP.

5.      Restart the system from the hard drive.  Change to the Stacker drive 
	and delete all files in the DOS subdirectory.
6.      Change to the OLD_DOS.1 subdirectory and copy all files to the DOS 
	subdirectory.

7.      Change to the Host drive and delete all files in the DOS subdirectory 
	and copy COMMAND.COM from the root of the Host drive to the root of 
	the Stacker drive.

8.      Copy any files into the DOS subdirectory that are called from the 
	CONFIG.SYS.
9.      Edit the CONFIG.SYS to renable SSWAP, and remove any DOS 6 memory 
	management region identifiers (/L:x,xxxxx)

10.     Restart the system.

11.     Delete all the files in the OLD_DOS.1 directory

12      Remove the OLD_DOS.1 directory.

     Case #2 You have the previous DOS version available on diskette.

1.      Remove the "read-only" attributes on the DOS 6 COMMAND.COM, on both 
	the Stacker drive and Host drive, in both the root and DOS 
	directories.

2.      Start the system with the previous DOS's startup disk.

3.      From the Startup diskette re-sys the Host boot drive.

4.      Edit the CONFIG.SYS on the host drive to disable SSWAP.


5.      Restart the system from the hard drive.  Change to the Stacker drive 
	and delete all files in the DOS subdirectory.

6.      Copy all files to the DOS subdirectory from the previous version DOS 
	diskettes.

7.      Change to the Host drive and delete all files in the DOS subdirectory 
	and copy COMMAND.COM from the root of the Host drive to the root of 
	the Stacker drive.
8.      Copy any files into the DOS subdirectory that are called from the 
	CONIFG.SYS.

9.      Edit the CONFIG.SYS to renable SSWAP, and remove any DOS 6 memory 
	management region identifiers (/L:x,xxxxx)

10.     Restart the system.

11.     Delete all the files in the OLD_DOS.1 directory

12.     Remove the OLD_DOS.1 directory.





































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Copyright 1993, Stac Electronics