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3301.TXT
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1993-06-17
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__________________________________________________________________________
STACKER NOTE STACKER NOTE
Title: Stacker and MS-DOS DOS 6.0 (Applies to Stacker 2.x and 3.0)
STAC FAX Index #3301 - 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 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