Stacker and MS-DOS DOS 6.0

 ___________________________________________________________________________

STACKER NOTE                                                   STACKER NOTE

Title: Stacker and MS-DOS DOS 6.0 (Applies to Stacker 2.x and 3.0)

STAC FAX Index #2304 - 04/02/93                         

___________________________________________________________________________    


Background.


   The information provided in this Stacker Note addresses issues related

   to compatibility between Stacker and MS-DOS 6.0. Stacker 2.x and 3.0 are   

   completely compatible with MS-DOS versions 3.2 and above, including MS-DOS 

   6.0. The MS-DOS setup program will detect Stacker's presence and install 

   files to the appropriate drives. This eliminates the need for DOS 

   installation batch files such as STACDOS5.BAT to perform a DOS upgrade.


   Microsoft includes a data compression product with MS-DOS 6.0. It is not  

   possible to run multiple data compression products simultaneously on a 

   single computer. DO NOT attempt to Stack a DoubleSpace ompressed drive 

   with Stacker 2.x or 3.0. The result could cause data loss. The MS-DOS 6.0  

   installation will not offer to use the DoubleSpace compression program on 

   your Stacked drive.


Installing MS-DOS 6.0 on a Stacker Drive.


   The DOS 6.0 setup program is aware of data compression programs. To install  

   MS-DOS 6.0 on a Stacker drive, use the normal DOS SETUP command. The setup  

   program will detect your Stacker drive and following message will appear:

   

           "Your computer uses a disk compression program.

            Setup can install MS-DOS on your computer.

            However, you will not be able to un-install

            MS-DOS during or after setup. For more information

            see 'Diagnosing and Solving Problems'."


   Setup will recommend to continue with the installation process. Installing  

   the utilities that are offered during the setup process will not impact 

   your Stacked system. Setup will not offer to install DoubleSpace if it 

   detects another compression program on your system.


   The DOS 6.0 system files will be properly transferred to the uncompressed  

   portion of the boot drive during installation. Any DOS device drivers that 

   are referenced in your CONFIG.SYS file will also be properly updated on 

   the uncompressed drive by the DOS setup program. It will be necessary to 

   manually update any DOS program that is located in the DOS directory on 

   the uncompressed drive, but is not referenced in your CONFIG.SYS file. For 

   example, to determine which drive is the uncompressed boot drive type 

   STACKER and press ENTER. The output will look similar to the following:


   Stacker Disk Mount Utility - 3.00, (c) 1990-92 Stac Electronics,

   Carlsbad, CA

   Registered to: Stac Electronics

     Stacker drive map:

     Drive C: was drive D: at boot time  [ D:\STACVOL.DSK = 80.30MB ]


   Look for the drive that C was at boot time. In the example drive C was drive 

   D at boot time, so drive D is the uncompressed boot drive. Now that you have 

   identified the uncompressed boot drive, copy CHKDSK.EXE from the DOS 

   directory on your compressed Stacker drive to the DOS directory on the 

   uncompressed drive. Do the same with any other DOS file that did not get 

   updated on the uncompressed boot drive. It is recommended that you keep a 

   copy of COMMAND.COM in the DOS directory on the uncompressed drive. 

   Stacker's boot file synchronizer may update COMMAND.COM automatically for 

   you. If it does not, manually copy COMMAND.COM to the DOS directory on the

   uncompressed  boot drive.



Installing Stacker on an MS-DOS 6.0 System.


   Stacker versions 2.x and 3.0 will install fine on any system that is 

   running MS-DOS 6.0. They are FULLY COMPATIBLE. However, it is important  

   that you DO NOT install Stacker on a drive that has been compressed with 

   the Microsoft DoubleSpace compression utility. Doing so could result in 

   data loss. If you wish to use Stacker and you have already compressed your  

   drives with DoubleSpace, follow the instructions in your MS-DOS 6.0 users 

   guide for removing DoubleSpace before installing Stacker.


   As indicated in the Stacker Users Guide, disable any Anti Virus programs 

   before running the Stacker setup program. This includes the Anti Virus 

   program that is a part of MS-DOS 6.0.



__________________________________________________________________________

Copyright 1993, Stac Electronincs


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