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	STACKER NOTE                                       STACKER NOTE
	Title: CONVERTING REMOVABLE DOUBLESPACE DISKS
	       (Applies to Stacker for Windows & DOS 3.1)
	STAC FAX 31601  (6/93)
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	BACKGROUND

	  Stacker's Setup converts only mounted, fixed DoubleSpace 
	  drives.  However, Stacker's DCONVERT program easily converts 
	  a removable disk, such as a floppy disk, a Bernoulli, or a 
	  SyQuest.

	  The following procedure assumes you've already installed 
	  Stacker. 
  
	SOLUTION

	  For this example, let's assume that Drive G: is a Bernoulli 
	  drive that was compressed with DoubleSpace.  In the 
	  conversion procedure, you will check the drive for any pre-
	  existing problems, run a program called DCONVERT to convert 
	  the drive, and then mount the new Stacker drive.

				   NOTE:                                                  

		Because it is not yet a Stacker drive, Drive 
		G does not appear in Stacker's drive map.

	  Check for any pre-existing problems

	    1.  If you are in Windows, please exit to DOS.  The 
		procedure works only under DOS.

	    2.  Insert the removable disk into its drive.

	    3.  Check the drive for any pre-existing problems.  At the 
		DOS prompt, type:
	
		    CHKDSK G: <Enter>
	
		Let the DOS CHKDSK utility fix any problems it finds.

	  Convert the drive to a Stacker drive

	    1.  Find the name of the compressed volume file by typing:

		    DIR G: /AH <Enter>
    
	    2.  Look for a filename such as DBLSPACE.000.  Note the 
		name to use in the next step.

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	Copyright 1993, Stac Electronics                    Page 1 of 2












	    3.  Type:

		    DCONVERT /C G:\DBLSPACE.000 <Enter>
	
		where DBLSPACE.000 is the drive to be converted to a 
		Stacker drive.

				    IMPORTANT!

		      DO NOT INTERRUPT THE CONVERSION PROCESS! 
		      If you do not let DCONVERT finish, you 
		      may lose data.

	  Mount the new Stacker drive

	    DCONVERT converts the drive into a Stacker drive.  The name 
	    of Stacker's "volume file" is STACVOL.DSK.  If you're using 
	    only one removable drive, Stacker Setup automatically 
	    allowed for it.  So, when you insert your removable disk 
	    into the drive, Stacker automatically mounts it.


		    TAKE FULL ADVANTAGE OF STACKER SAFETY

	  Stacker Optimizer can recompress your data safely, giving you 
	  double the disk capacity without the DoubleSpace risks. 
  
	  To recompress your data with the Stacker Optimizer:

	    1.  At the DOS prompt, type:
	
		    STAC <Enter>

	    2.  Choose Stacker Optimizer.

	    3.  Select the drive you want to recompress.

	    4.  Choose Restack.
	
		Stacker recompresses the data on the selected drive.
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	Copyright 1993, Stac Electronics                    Page 2 of 2