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	STACKER NOTE                                       STACKER NOTE
	Title: INACCESSIBLE REMOVABLE DRIVES
	       (Applies to Stacker for Windows & DOS 3.0)
	STAC FAX 3506  (6/93)
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	BACKGROUND

	  When removable Stacker drives are not accessible, do not 
	  mount, or do not automount, the problem is generally due to a 
	  disk cache program such as SMARTDRV.EXE (from Windows 3.1) or 
	  PCKWIK.  You may see one of these messages:

	      Invalid Unit Reading Drive x

			   OR

	      Not Ready Reading Drive x

	  Usually QEMM has loaded both Stacker and SMARTDRV.EXE high. 
	  A similar problem can occur with SMARTDRV.EXE and removable 
	  drives, such as Bernoulli, SyDos, SyQuest, and Sysgen, even 
	  if the removable drive is NOT a Stacker drive.

	SOLUTION

	  The situation is corrected in the Stacker 3.03 maintenance 
	  release.  Stacker now makes the drives accessible and the 
	  automount feature operate properly when DOS locates the 
	  drives.  Contact Stac Product Support if you need the 
	  maintenance release to avoid this situation.

	  You can add the /AUTO=Z switch now to fix your configuration. 
	  To add the switch:

	    1.  Use any text editor to edit your CONFIG.SYS file and 
		add this switch to the Stacker device driver line 
		before the first Stacker drive name:

		    /AUTO=Z
    
	    2.  Save the file and exit to DOS.

	    3.  Restart your computer.

	  When both the Stacker and the disk cache drivers are loaded 
	  high, you may be able to use an additional SSWAP to swap the 
	  removable drive that has problems.  For example, if D is a 
	  Bernoulli drive that won't mount, a special SSWAP line might 
	  correct the problem with SMARTDRV.EXE.

    
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	Copyright 1993, Stac Electronics                    Page 1 of 2












	    1.  Use any text editor to edit your CONFIG.SYS file and 
		add this DEVICE line following any other SSWAP DEVICE 
		commands.

		    DEVICE=C:\STACKER\SSWAP.COM D: D:

	    2.  Save the file and exit to DOS.

	    3.  Restart your computer.

	  If you still have problems and have a different cache program 
	  available, such as SMARTDRV.SYS or Speedcache for Iomega, try 
	  it out.  It may eliminate the conflict.
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	Copyright 1993, Stac Electronics                    Page 2 of 2