README.TXT

NOTES ON MS-DOS 6
=================

This file provides important information not included in the
MICROSOFT MS-DOS 6 USER'S GUIDE or in MS-DOS Help.

The following are the major sections of the README.TXT file:

1. Setup
2. MemMaker and Memory Management
3. Windows
4. Hardware Compatibility with MS-DOS 6
5. Microsoft Programs
6. Third-Party Programs
7. DoubleSpace

If the subject you need information on doesn't appear in the
README.TXT file, you may find it in one of the following text
files included with MS-DOS:

* OS2.TXT, which describes how to remove and save data on your
  computer when you upgrade to MS-DOS 6.

* NETWORKS.TXT, which describes how to update your network software
  for use with MS-DOS 6.

The following topics are discussed in the README.TXT file:

1. Setup
   1.1 SpeedStor
   1.2 Incompatible Hard Disk or Device Driver
   1.3 AT&T 6300 Computer
   1.4 Toshiba with a Hard RAM Disk 
   1.5 LapLink
   1.6 Tandy with ROM DOS
   1.7 Setup displays the "Your computer uses a disk-compression
       program that is incompatible with Setup" message
   1.8 You deleted files from the directory that Setup needs
       to install the optional programs
   1.9 Running Setup if Your Computer Uses Windows NT
   1.10 Setup detects that your computer has a non-MS-DOS 
	partition or non-MS-DOS files, and your computer uses Windows NT
   1.11 Setup detects that your computer uses DR-DOS
   1.12 Installing MS-DOS on a Drive Other Than C
   1.13 Bypassing the Uninstall Disk and Using Default Setup Options
   1.14 Setup displays the "Your computer uses password protection"
	screen
   1.15 Setup displays the "Your computer is using an incompatible
	delete-protection program" screen
   1.16 Western Digital SCSI Hard-Disk Controller
   1.17 Dell DOS 3.30
   1.18 Setting up over a system with a Corel UNI_ASP.SYS driver
   1.19 Installing MS-DOS 6 on a computer with Micro House DrivePro or
	similar product
2. MemMaker and Memory Management
   2.1 Intel Expanded-Memory Driver (EMM.SYS)
   2.2 When you run Windows, MS-DOS indicates that your 
       display driver uses the monochrome address range
   2.3 Running MemMaker on a computer with PC-NFS
   2.4 Your computer has an Adaptec controller card, and MemMaker
       won't work correctly
   2.5 386MAX (5.11 or Earlier)
3. Windows
   3.1 "Cannot run Windows in standard mode" Message
   3.2 Your computer uses a Windows 3.0 permanent swap file
4. Hardware Compatibility with MS-DOS 6
   4.1 Compaq EXTDISK.SYS Driver
   4.2 Hardcard
   4.3 Inboard 386/PC
   4.4 Olivetti and AT&T System with a CGA Video Board
   4.5 Toshiba
5. Microsoft Programs
   5.1 Microsoft Anti-Virus
   5.2 Running Backup for MS-DOS under Windows
   5.3 Backup for Windows
   5.4 Defrag
   5.5 Microsoft CD-ROM Extensions
6. Third-party Programs
   6.1 4DOS and NDOS 
   6.2 Above Board 286 and Above Board Plus Installation
       Programs
   6.3 After Dark for DOS (AD-DOS)
   6.4 AutoCAD release 10
   6.5 CodeView
   6.6 Colorado Tape Backup
   6.7 Fastback
   6.8 Norton Desktop for Windows 2.0
   6.9 Norton Utilities
   6.10 PC Tools
   6.11 PC-Kwik Disk Accelerator
   6.12 QEMM-386 (6.02 or earlier)
   6.13 Soft-ICE
   6.14 Ventura Publisher
7. DoubleSpace
   7.1	Manually Converting Your Disk-Compression Software to DoubleSpace
   7.2  DoubleSpace Setup indicates that your computer is running an
	incompatible disk-caching program
   7.3	Your compressed drive runs out of disk space
   7.4	Your uncompressed drive runs out of disk space
   7.5	DoubleSpace did not compress all of your files because
	the drive ran out of disk space
   7.6	Removing DoubleSpace From Your Computer
   7.7	DoubleSpace and Windows Permanent Swap Files
   7.8	If EXTDISK.SYS displays a warning about drive letters
   7.9	You Need a Special Device Driver to Use a Compressed Drive
   7.10 You Need a Special Device Driver to Use Your Startup Drive
   7.11 Defragmenting Uncompressed Drives After Changing File Attributes
   7.12 Files DoubleSpace Cannot Compress
   7.13 DoubleSpace and Microsoft Mail 3.0 .MMF Files
   7.14 Defragmenter Runs Out Of Memory While You Are Compressing a Drive

1. SETUP
========

1.1 SpeedStor
-------------
If you have a SpeedStor partition on your computer, Setup
probably referred you to this section for one of the following
reasons:

* Setup could not find in your CONFIG.SYS file a command
  for the device driver that supports your SpeedStor partition.
  If this is the case, add the command line to your CONFIG.SYS
  file, restart your computer, and run Setup. For more information
  about adding the command line to your CONFIG.SYS file, see your
  SpeedStor documentation.

* Your CONFIG.SYS file has a DEVICE=HARDRIVE.SYS line in it.
  If this is the case, carry out the following procedure:
   1. Use the EXPAND command to expand and copy the SSTOR.SYS
      file to your hard disk. Make sure you copy the SSTOR.SYS
      file to the same path as the HARDRIVE.SYS file.

      See the PACKING.LST file on Setup Disk 1 for the location 
      of the SSTOR.SYS file on the Setup disks and for instructions
      on how to expand and copy it to your hard drive.

   2. Replace the DEVICE=HARDRIVE.SYS file with a DEVICE=SSTOR.SYS 
      command. For example, if the command that loaded the
      HARDRIVE.SYS file was "DEVICE=C:\SSTOR\HARDRIVE.SYS", you
      would replace it with the following:

      DEVICE=C:\SSTOR\SSTOR.SYS

   3. Restart your computer by pressing CTRL+ALT+DEL.

   4. Make sure you can access your hard drive.

   5. Run Setup.

1.2 Incompatible Hard Disk or Device Driver
-------------------------------------------
If Setup referred you to this section, and no other section
in this file is relevant to your system, you have a partition
that is incompatible with MS-DOS 6. You must delete the partition
from your hard disk. See "Using Fdisk to Configure Your Hard Disk"
in the chapter "Diagnosing and Solving Problems" of the MICROSOFT MS-DOS
6 USER'S GUIDE.

1.3 AT&T 6300 Computer
----------------------
If you use an AT&T 6300 computer and your ROM BIOS is
version 1.20 or earlier, contact your vendor for a ROM BIOS
upgrade. The ROM BIOS version number is displayed when you
start your computer.

1.4 Toshiba with a Hard RAM Disk
--------------------------------
These instructions apply to Toshiba models T1200, T1600,
T1200XE and T1000LE.

To use the hard RAM disk, carry out the following procedure
before installing MS-DOS 6:

1. Back up your hard RAM disk.

2. Using the Toshiba Setup program, delete the hard RAM
   disk by allocating zero kilobytes to it. All data on
   the hard RAM disk will be lost.

3. Restart your system.

4. Run Setup.

5. Use the Toshiba Setup program to reinstall the hard RAM
   disk.

6. Run FDISK, change to drive 2, and create a primary DOS
   partition. Quit FDISK.

7. Use the FORMAT command to format drive D.


1.5 LapLink
-----------
If you use Traveling Software LapLink, disable the LapLink
device driver before you install MS-DOS 6. Once you install MS-
DOS 6, reenable the LapLink driver.

1.6 Tandy with ROM DOS
----------------------
Contact your hardware manufacturer for information about
upgrading a Tandy computer with ROM DOS to MS-DOS 6. This
applies to the following models: 1000HX, 1000SL, 1000SL2,
1000TL, 1000TL2, 1000TL3, 2500XL, 2500XL2.


1.7 Setup displays the "Your computer uses a disk-compression
     program that is incompatible with Setup" message
--------------------------------------------------------------
If Setup indicated that your computer has an incompatible
disk-compression program, you must remove it manually before
you can install MS-DOS 6. Carry out the following procedure.

NOTE
As an alternative, contact your disk-compression vendor for an
updated version of your software. In most cases, current versions
of disk-compression software are compatible with MS-DOS 6.

1. Back up the files on your hard disk.

2. If your Setup disks are compatible with drive A, insert
   Setup Disk 1, and restart your computer by pressing
   CTRL+ALT+DEL. After Setup displays the first screen,
   exit Setup by pressing F3 twice.

   If your Setup disks are not compatible with drive A,
   create a startup floppy disk for drive A by inserting Setup
   Disk 1 in drive B, and typing the following at the command
   prompt:

   b:setup /f

   When prompted, choose to install MS-DOS to a floppy disk
   in drive A. After Setup is finished, restart your computer
   by inserting your startup disk in drive A, and pressing
   CTRL+ALT+DEL.

3. Type A:FORMAT C: /S to reformat your startup drive and
   transfer the MS-DOS 6 system files.

4. Remove your Setup or startup disk from drive A, and
   restart your computer by pressing CRTL+ALT+DEL.

5. Insert Setup Disk 1 in drive A or B, and type A:SETUP or
   B:Setup at the command prompt.

6. After Setup is complete, type DBLSPACE, and follow the
   instructions on your screen.

   For more information on DoubleSpace, see the chapter
   "Freeing Disk Space."

7. After you have installed DoubleSpace, restore the files
   you backed up. Make sure not to restore older versions of
   MS-DOS files over your MS-DOS 6 files.

1.8 You deleted files from the directory that Setup needs
     to install the optional programs
----------------------------------------------------------
If you typed "busetup /e" at the command prompt, Setup displayed
the "Setup did not find the files it needs in the directory
specified" message, and you think you deleted the files from
your hard disk, carry out the following procedure:

o  Insert Setup Disk 1 in drive A or B, and run Setup by typing
   A:SETUP /E or B:SETUP /E at the command prompt.

1.9 Running Setup if Your Computer Uses Windows NT
--------------------------------------------------
If your computer has Windows NT installed on it, but
does not have a version of MS-DOS installed on it, carry out
Procedure 1. If your computer has Windows NT and MS-DOS installed
on it, carry out Procedure 2.

Procedure 1

1. Run Setup by inserting Setup Disk 1 in drive A, and restarting
   your computer by pressing CTRL+ALT+DEL.

   NOTE
   Windows NT will be disabled after Setup. If you want to
   reenable Windows NT, and NT was installed on a FAT partition,
   install Flexboot so that you can access to both the Windows
   NT and MS-DOS operating systems.

   If Windows NT was installed on a non-FAT partition, see the
   following section

Procedure 2

1. Make sure you have installed Flexboot on your computer.

2. When you start your computer, choose MS-DOS as your operating
   system.

3. Run Setup by inserting Setup Disk 1 in drive A or B, and typing
   A:SETUP or B:SETUP at the command prompt.

1.10 Setup detects that your computer has a non-MS-DOS
     partition or non-MS-DOS files, and your computer uses
     Windows NT
----------------------------------------------------------
The procedure you use depends on whether you want to preserve
the partition and its files. Find the section below that describes
the configuration you want.

You Don't Want to Preserve the Partition Nor its Files
------------------------------------------------------
If you don't want to preserve the partition or its files,
choose to remove the partition or files if Setup prompts you to do so.
If Setup doesn't offer you that choice, remove the partition
manually after Setup. For instructions on removing a non-MS-DOS
partition manually, see "Using Fdisk to Configure Your Hard
Disk" in the chapter "Diagnosing and Solving Problems" of the
MICROSOFT MS-DOS 6 USER'S GUIDE.

You Don't Want to Preserve the Partition But Want to Save its Files
-------------------------------------------------------------------
If you want to save the data files, but don't want to
preserve the partition, back up the files, run Setup again,
and then choose to remove the partition or files if Setup prompts
you to do so. If it doesn't offer you this choice, remove the
partition manually after Setup. For instructions on removing the
partition manually, see "Using Fdisk to Configure Your
Hard Disk" in the chapter "Diagnosing and Solving Problems" of the
MICROSOFT MS-DOS 6 USER'S GUIDE.

You Want to Preserve the Partition and Its Files
------------------------------------------------
Carry out the following procedure.

NOTE
If the non-MS-DOS partition takes up all the space on your hard disk,
you have no choice but to reconfigure your hard disk. You can either let
Setup do it for you, as described above, or reconfigure it yourself
manually. See your Windows NT documentation for instructions on how
to reconfigure your hard disk manually.

To install MS-DOS 6 and preserve your partition or files:

1. Run Setup again.

2. When prompted, choose to continue Setup without removing the
   partition or files.

3. After Setup is complete, install Flexboot.

   With Flexboot, you should be able to access both your MS-DOS and
   Windows NT operating systems.

1.11 Setup detects that your computer uses DR-DOS
-------------------------------------------------
If you have DR-DOS installed on your computer, you should take the
following precautions before restarting Setup:

o If your system has any security features, including password protection,
  you should disable them. For more information, see "Setup displays
  the 'Your computer uses password protection' screen" in the
  chapter "Diagnosing and Solving Problems" of the MICROSOFT MS-DOS
  6 USER'S GUIDE.

  If you have protected any files or directories with a password,
  remove the password protection, particularly if you have protected
  your CONFIG.SYS or AUTOEXEC.BAT files, or your DR-DOS directory.

o If you have DELWATCH installed on your computer, carry out
  the procedure "Setup displays the 'Your computer is using an
  incompatible delete-protection program' screen" in the chapter
  "Diagnosing and Solving Problems" of the MICROSOFT MS-DOS
  6 USER'S GUIDE.

o If your CONFIG.SYS or AUTOEXEC.BAT files use any conditional commands--
  such as the "?" or GOTO commands--you should remove them and adjust
  the order of commands in your startup files accordingly.

o If your CONFIG.SYS uses the CHAIN command, you should remove it and
  adjust the order of commands in this file accordingly.

o If your computer uses disk-compression, but drive C is not compressed,
  run Setup as described in "Getting Started" of the MICROSOFT MS-DOS
  6 USER'S GUIDE. When Setup displays the "Your CONFIG.SYS file contains
  commands that are not valid MS-DOS command," choose the "Modify
  original files" option.

  If drive C is compressed, carry out the following procedure:

  1. Determine which drive is your original uncompressed drive. For more
     information, see your DR-DOS documentation.

  2. Make backup copies of the CONFIG.SYS and AUTOEXEC.BAT files on your
     compressed drive, and the DCONFIG.SYS on your uncompressed drive.

  3. Combine the two configuration files. For example, if drive D is your
     uncompressed drive, type the following at the command prompt:

     copy d:\dconfig.sys+c:\config.sys d:\config.sys

  4. Copy the combined CONFIG.SYS file to drive C. For example, if drive
     D is your uncompressed drive, type the following at the command
     prompt:

     copy d:\config.sys c:\config.sys

  5. Copy your AUTOEXEC.BAT to your uncompressed drive. For example, if
     drive D is your uncompressed drive, type the following at the
     command prompt:

     copy c:\autoexec.bat d:\autoexec.bat

  6. Run Setup.

  7. When Setup displays the "Your CONFIG.SYS file contains commands
     that are not valid MS-DOS command," choose the "Modify original files"
     option.

     When Setup displays the "Because you are currently using the
     DR-DOS operating system" message, choose Continue.

  8. After Setup is complete, MS-DOS displays an "Unrecognized command"
     message on your screen for each command in your AUTOEXEC.BAT and
     CONFIG.SYS files that is not a valid MS-DOS commmand. Remove these
     commands from your CONFIG.SYS and AUTOEXEC.BAT files.

  9. Add the DEVICE=HIMEM.SYS command to the beginning of your
     CONFIG.SYS file, and the restart your computer.

1.12 Installing MS-DOS on a Drive Other Than C
----------------------------------------------
As described in the following procedure, you can install MS-DOS
to a drive other than C by using the /M switch to copy the system
files to your startup drive and then using the /Q switch to copy your
MS-DOS files to a different drive.

NOTE
This procedure is designed for advanced users. If your computer
uses disk-compression software, modify the following procedure
as appropriate.

NOTE
If your computer uses a partition, such as Disk Manager, SpeedStor,
Priam, or Everex, which replaces the BIOS in interactions between
DOS and your hard disk-controller, you should not carry out the
following procedure until you have carried out steps 1 through 3 of
"You need to install MS-DOS manually" in "Diagnosing and Solving
Problems" of the Microsoft MS-DOS User's Guide. After you have
carried out these steps, skip to step 3 of the following procedure.

1. Run Setup by inserting Setup Disk 1 in a floppy disk drive, and
   typing A:SETUP /M or B:SETUP /M at the command prompt.

   NOTE
   Your CONFIG.SYS and AUTOEXEC.BAT files were saved as CONFIG.NEW
   and AUTOEXEC.NEW.

2. Run Setup by inserting Setup Disk 1 in a floppy disk drive, and typing
   A:SETUP /Q or B:SETUP /Q at the command prompt. Follow the
   instructions on your screen.

3. When Setup displays the system settings screen, choose the MS-DOS
   Path option. Then type the drive and directory to which you want
   to install MS-DOS, and press ENTER. Continue Setup.

4. Open your CONFIG.NEW and AUTOEXEC.NEW files and ensure that their
   commands have the right path. Save the files as CONFIG.SYS
   and AUTOEXEC.BAT. Then restart your computer.

1.13 Bypassing the Uninstall Disk and Using Default Setup Options
-----------------------------------------------------------------
To keep Setup from creating an Uninstall Disk, run Setup
with the /G switch.

To bypass the Uninstall disk and use default Setup options
instead of choosing them yourself, run Setup with both the
/H and /G switches.

WARNING
The primary purpose of the Uninstall Disk is to safeguard
your files during and after Setup. If Setup doesn't create
an Uninstall Disk during Setup, you will not be able to
restore your previous version of DOS. In addition, if
Setup should render your hard disk inaccessible, you will
not be able to use the Uninstall Disk to make it accessible
again.

NOTE
If you have a version of MS-DOS earlier than 5.0, and you use
the /G switch or the /H and /G switches together, Setup will not
prompt you if you need to update your network files.

1.14 Setup displays the "Your computer uses password protection"
     screen
----------------------------------------------------------------
See section 1.11 of this file.

1.15 Setup displays the "Your computer is using an incompatible
     delete-protection program" screen
---------------------------------------------------------------
See section 1.11 of this file.

1.16 Western Digital SCSI Hard-Disk Controller
---------------------------------------------
If you are using a Western Digital WD 7000 FASST or AT/XT
SCSI controller with hard-disk ROM version 3.35 or earlier,
contact Columbia Data Products Customer Services for an
upgrade before installing MS-DOS 6. The ROM version number
is displayed when you start your computer.

1.17 Dell DOS 3.30
------------------
Some Dell DOS 3.30 installations were done with a utility
called AFORMAT, which creates and formats multiple 32 MB
partitions. These extended partitions become invisible with
MS-DOS 6 unless you run a utility called FIXPART before or
after upgrading to MS-DOS 6. Contact Dell to obtain the
FIXPART utility.

1.18 Setting up over a system with a Corel UNI_ASP.SYS driver
-------------------------------------------------------------
If Setup stops running when you try to install MS-DOS 6, and your
system uses a Corel UNI_ASP.SYS driver to enable an optical drive,
delete the DEVICE command that loads the Corel UNI_ASP.SYS driver
in your CONFIG.SYS file. Then run Setup again. After Setup is
finished, reinstall the Corel UNI_ASP.SYS driver as you originally
installed it.

1.19 Installing MS-DOS 6 on a computer with Micro House DrivePro
     or similar product
----------------------------------------------------------------
If you use Micro House DrivePro or a similar product that uses
a proprietary Master Boot Record (MBR), install MS-DOS 6 by
following the procedure in "You need to install MS-DOS manually"
in the chapter "Diagnosing and Solving Problems" of the
MICROSOFT MS-DOS 6 USER'S GUIDE.

NOTE
After Setup, if you want to install Microsoft Anti-Virus, Backup,
or Undelete, run Setup by typing SETUP /U /E.

2. MEMMAKER AND MEMORY MANAGEMENT
=================================

2.1 Intel Expanded-Memory Driver (EMM.SYS)
------------------------------------------
If you use Intel's EMM.SYS driver with Aboveboard, use
EMM.SYS version 4.0 revision D or later . If you have an
earlier version, contact Intel for a free upgrade.

2.2 When you run Windows, MS-DOS indicates that your display
    driver uses the monochrome address range
------------------------------------------------------------
If your computer uses a Windows 3.0 display driver, you need
to modify your SYSTEM.INI file to make the driver compatible
with the MS-DOS 6 EMM386 memory manager. Carry out the
following procedure:

1. Open your SYSTEM.INI file, and find the [386enh] section.

2. Add a DEVICE= line for the MONOUMB.386 file. For example, if
   DOS is your MS-DOS directory, add the following line:

   DEVICE=C:\DOS\MONOUMB.386

3. Save the file, and restart your computer by pressing CTRL+ALT+DEL.
   Then run Windows again.

2.3 Running MemMaker on a computer with PC-NFS
----------------------------------------------
If you use PC-NFS network software, carry out the following procedure
before you run MemMaker:

1. Open your MEMMAKER.INF file using any text editor. This file is
   in the directory that contains your MS-DOS files.

2. Add the following line to the file:

   *NET

3. Save the file, and then run MemMaker.

2.4 Your computer has an Adaptec controller card, and MemMaker
    won't work correctly
-------------------------------------------------------------------
If MemMaker stops running when you try to optimize your computer's
memory configuration, and you use the ADAPTEC.SYS driver with your
Adaptec controller card, your computer is probably incompatible
with MemMaker. Carry out the following procedure to restore your
system:

1. Restart your computer by pressing CTRL+ALT+DEL. The following text
   is displayed on your screen:

   Starting MS-DOS...

   While the text is on your screen, press and release the F8 key.

2. Carry out all the commands in your CONFIG.SYS file by pressing
   Y each time your are prompted except when you are prompted for
   the EMM386.EXE command. When you are prompted for this command,
   press N to bypass it. When you prompted for your AUTOEXEC.BAT file,
   press Y to process it.

3. Open your CONFIG.SYS, and move the command for the ADAPTEC.SYS driver
   so that it appears before the commands for your HIMEM.SYS and EMM386.EXE
   files. Save the file, and then restart your computer by pressing
   CTRL+ALT+DEL.

2.5 386MAX (5.11 or Earlier)
----------------------------
If you have used the SETVER command to report a different
version number to a program you are loading into the upper
memory area with 386LOAD.COM or MAXHI.COM, also use the
SETVER command to report that number to 386LOAD.COM or
MAXHI.COM. For information about the SETVER command, type
HELP SETVER at the command prompt after you have installed
MS-DOS 6.

The new version number is reported to all programs loaded by
386LOAD.COM and MAXHI.COM.

MAXHI.COM programs supplied with versions of 386MAX earlier
than 5.0 are incompatible with MS-DOS 6.

3. WINDOWS
==========

3.1 "Cannot run Windows in standard mode" Message
-------------------------------------------------
If you have a DEVICE=EMM386.EXE command that includes the
RAM or NOEMS switch in your CONFIG.SYS file, you cannot run
Windows 3.0 in standard mode. Either remove the RAM or NOEMS
switch or run Windows in real or enhanced mode.

NOTE: Using EMM386 may reduce the amount of extended memory
available to Windows and cause Windows to try to start in
standard mode. To prevent this, reduce the amount of
extended memory that other device drivers use. For example,
if you are using SMARTDrive, try setting the MinCacheSize
parameter to 0.


3.2 Your computer uses a Windows 3.0 permanent swap file
--------------------------------------------------------
If your computer uses a Windows 3.0 permanent swap file, you
need to run the SPATCH.BAT program to make the swap file
compatible with MS-DOS 6. To do so, carry out the following
procedure:

1. Make sure the SPATCH.BAT program is on your hard disk. If it
   isn't, copy it from the Setup disks. For the location of the
   file on the Setup disk, view the PACKING.LST file on Setup Disk
   1.

2. Type the following at the command prompt:

   spatch [drive]:[path]swapfile.exe

   For the drive and path parameters, specify the location of
   your SWAPFILE.EXE file.

3. Follow the instructions on your screen.

   The program modifies the SWAPFILE.EXE for use with MS-DOS 6
   and saves a backup copy as SWAPFILE.SAV. After you have confirmed
   the file works correctly, you can delete the SWAPFILE.SAV file.


4. HARDWARE COMPATIBILITY WITH MS-DOS
=====================================

4.1 Compaq EXTDISK.SYS Driver
-----------------------------
Compaq EXTDISK.SYS driver version 3.00 or later is
compatible with MS-DOS 6. If you have version less
than 3.00, contact your vendor for an upgrade.

4.2 Hardcard
------------
a) Hardcard II

   If you can't use Plus Development Hardcard II or Hardcard
   II XL when running EMM386.EXE, specify the exclude (x=)
   switch to prevent EMM386 from conflicting with the card's
   BIOS address.

   See your Hardcard II manual to determine which address
   space to exclude. Type HELP EMM386.EXE at the command
   prompt for more information about the exclude switch.

b) Hardcard 40 or Passport

   If you are using Hardcard 40 or a Passport removable
   disk, and you have a DEVICE command for PLUSDRV.SYS in
   your CONFIG.SYS file, disable or remove the DEVICE command
   for PLUSDRV.SYS command line in your CONFIG.SYS file.
   Then run Setup. After Setup is finished, reenable or return
   the DEVICE command for PLUSDRV.SYS in your CONFIG.SYS file.
   Make it the last line in the file.

4.3 Inboard 386/PC
-------------------
The Inboard 386/PC is incompatible with the EMM386 memory
manager that comes with MS-DOS 6.

4.4 Olivetti and AT&T Systems with a CGA Video Board
----------------------------------------------------
An Olivetti or AT&T system with a CGA video board may not scroll
correctly. Add the /S switch to the DEVICE=ANSI.SYS command
in your CONFIG.SYS file.

4.5 Toshiba
-------------------
If you used the MS-DOS 5.0 version of EMM386 before you ran
Setup, and you use the Power Management function, you should use
the VRESUME program or device driver to avoid problems with
the Resume feature. Carry out the following procedure:

1. Make sure VRESUME.COM or VRESUME.SYS is on your hard disk.
   Add a command for VRESUME.COM to your AUTOEXEC.BAT file if you
   want to load the TSR. Add a command for the VRESUME.SYS file
   if you want to load the device driver.

2. Save the file, and restart your computer by pressing CTRL+ALT+DEL.

   NOTE
   For information about using VRESUME with Windows 3.0, see your
   WRESUME.TXT file on your MS-DOS 5.0 disks.

5. MICROSOFT PROGRAMS

5.1 Microsoft Anti-Virus
------------------------
Before cleaning a program file, make sure you have a backup copy of it.
If you clean a program file, and the program is corrupted, reinstall the
program. If MSAV again detects a virus, there is a chance the detection
is in error; contact your software vendor to deterimine if there is an
updated version of the program.

5.2 Running Backup for MS-DOS under Windows
-------------------------------------------
It is recommended that you don't run Backup for MS-DOS under Windows.
However, if you do, and if your system is not configured correctly, Backup
may display the following symptoms:

o Backup appears to stop running--for example, the clock moves, but
  there is no disk activity.

o Backup reports problems while testing the second floppy disk during
  the compatibility test. For example, it might displays a "Diskette
  not properly seated" message or it might ask for Disk 1 repeatedly.

o Windows displays a message that DMA buffer size needs to be increased.

o Backup quits unexpectedly.

You can correctly configure your system by carrying out the following
procedure.

1. Open your SYSTEM.INI file, and add a DMABufferSize=32 line to the
   [386enh] section.

2. When you run Backup, make sure that you specify with the Settings
   command from the Control menu that Backup run with the Exclusive
   and Full Screen options.

5.3 Backup for Windows
----------------------
If Microsoft Backup for Windows stops running at the end of the
Compatibility Test, you may have an incompatible third-party
backup driver in your SYSTEM.INI. Carry out the following
procedure:

1. Open your SYSTEM.INI file, and locate the [386enh] section.

2. Check to see if any of the following lines are included in this
   section:

   device=fastback.386
   device=vfd.386
   device=cpbvxd.386
   device=virwt.386

3. If you find any of these lines, add a semicolon (";") to the front
   of the line.

4. Save the file, restart Windows, and run Microsoft Backup again.

5.4 Defrag
----------
If you run Defrag and MS-DOS still displays out-of-memory messages after
you have followed the procedures in "An MS-DOS program displays
an out-of-memory message" in the chapter "Diagnosing and Solving
Problems" of the Microsoft MS-DOS User's Guide, your computer
might have too many files for Defrag to reorganize the files on
your hard disk. For Defrag to work correctly, you might need to
delete some files or move them to a floppy disk or a network drive.

5.5 Microsoft CD-ROM Extensions
-------------------------------
Use the MSCDEX.EXE file that comes wtih MS-DOS 6.

If you load MSCDEX.EXE with a batch file or program,
make sure it loads the MSCDEX.EXE file that comes with 
MS-DOS 6. The MS-DOS Setup program copies the file
to the directory that contains your MS-DOS files.

6. THIRD-PARTY PROGRAMS
=======================

6.1 4DOS and NDOS
-----------------
4DOS (prior to 4.02) and NDOS (prior to Norton Utilities 7.0) are
compatible with MS-DOS 6.  However, to use some of the new features
in MS-DOS 6 (such as MemMaker, the LOADHIGH command, DIR switches,
and so on), contact JP Software for an update of 4DOS or Symantec
for an update of NDOS.

NOTE
If you use multiple configurations, 4DOS or NDOS will not automatically
run your AUTOEXEC.BAT file unless you include a /P on your SHELL= line in
your CONFIG.SYS file.

To use MS-DOS 6 Help with NDOS or 4DOS, start it using the COMMAND /C
HELP command.  Or, you can define an 4DOS alias for MS-DOS Help.

6.2 Above Board 286 and Above Board Plus Installation
    Programs
-----------------------------------------------------
Before using an Above Board installation program prior to
May 1989, make sure you haven't loaded software such as
SMARTDrive or RAMDrive that uses extended memory.  After the
Above Board has been installed, other software using
extended memory is unaffected.

6.3 After Dark for DOS (AD-DOS)
-------------------------------
If you run After Dark for DOS (AD-DOS) at the same time you 
are running programs that use DPMI, you may have problems with 
MS-DOS--for example, your system may halt suddenly or you may 
receive "packed-file corrupt" messages. Examples of programs
that use DPMI are Microsoft MASM61, C7, and FoxPro25.

6.4 AutoCAD release 10
---------------------
To run AutoCAD release 10 for MS-DOS, contact Autodesk for a
patch file. No patch is needed for AutoCAD386.

6.5 CodeView
-----------
CAUTION: Using versions 3.0 to 3.13 of the CodeView CV.EXE
file may cause data loss if your system has a 80386 memory
manager (such as EMM386.EXE) and device drivers or programs
that use extended memory. To determine which version you
have, type CV.EXE at the command prompt.

6.6 Colorado Tape Backup
------------------------
If you receive a message that you have two versions of the
VFINTD.386 file loaded, you probably need to edit your
SYSTEM.INI file. Carry out the following procedure:

1. Open your SYSTEM.INI file and locate the [386enh] section.
   You should see two lines similar to the following:

   device=C:\TAPE\CMSDTAPE.386
   device=C:\DOS\VFINTD.386

2. If you plan to use your Colorado Tape Backup program, add a semi-
   colon (";") to the front the line for the VFINTD.386 file. If you
   plan to Microsoft Backup, add a semi-colon to the front of the line
   for the CMSDTAPE.386 file.

3. Save the file, and restart Windows.

6.7 Fastback
-------------
To ensure that you don't lose data, if you have a version 
of Fifth Generation Systems Fastback earlier than 3.0, you 
must use the LOADFIX command before running Fastback or the 
Fastback installation program. Type the following:

LOADFIX FB.EXE

or

LOADFIX FBINSTAL.EXE

6.8 Norton Desktop for Windows 2.0
----------------------------------
Setup modifies Norton Desktop for Windows by adding a
second Tools menu which contains Backup and Antivirus commands
(if you installed these Windows programs), as well as a
DoubleSpace Info command.

If you installed the Anti-Virus, Backup, and Undelete
for Windows, you can add to Norton Desktop a Microsoft
Tools group containing the programs' icons. Carry out Procedure 1
if you have a group open and want to add to it the
Microsoft Tools group. Carry out Procedure 2 if you don't have a
group open.

Procedure 1 To add the Microsoft Tools Group if the group window
	    is open:

* Drag the file C:\DOS\WNTOOLS.GRP and drop it on the group window.

Procedure 2 To add the Microsoft Tools Group if the the group window
	    is not open:

1. Select the group into which you want the Microsoft Tools group to
   go--for example, the Main or Quick Access group.

2. From Norton Desktop for Windows, choose New from the File menu.

3. In the New dialog box, select Group as the Type.

4. In the Group File Name box, type the path to the WNTOOLS.GRP file. 
   This file is in the directory that contains your MS-DOS files. For
   example, if this directory is C:\DOS, type the following:

   C:\DOS\WNTOOLS.GRP

5. Choose OK.

6.9 Norton Utilities
--------------------
The "Clear Space" option of Norton SpeedDisk (prior to version 7.0)
is incompatible with DoubleSpace drives. Contact your software vendor
for an updated version of Norton SpeedDisk.

You should not use the WipeInfo utility on DoubleSpace drives because
it can cause lost clusters.

6.10 PC Tools
-------------
As reported by DoubleSpace CHKDSK, the DISKFIX /SCAN option
in PC Tools can cause lost clusters on DoubleSpace drives. If you
have already used this option, the DBLSPACE /CHKDSK /F command will
fix the lost clusters.

The FORMAT command of PC Tools version 7.1 conflicts with
MS-DOS 6. You should use the FORMAT.EXE command that comes
with MS-DOS 6.

The COMPRESS command of PC Tools version 6.0 is incompatible
with DoubleSpace.

6.11 PC-Kwik Disk Accelerator
-----------------------------
Do not load versions of Multisoft PC-Kwik Disk Accelerator
earlier than 2.0 into the upper memory area.

6.12 QEMM-386 (6.02 or earlier)
-------------------------------
Quarterdeck's QEMM memory manager is compatible with MS-DOS 6.
Quarterdeck has a Technical Note #166, MSDOS6.TEC, which discusses
how to get the most out of running their products with MS-DOS 6. This
technote can be obtained from their BBS, Compuserve (GO QUARTERDECK,
Library 2), BIX (JOIN DESQVIEW), and their Q/FAX automated fax-back
service.

6.13 Soft-ICE
-------------
When using Nu-Mega Soft-ICE, load it before loading other
drivers. Otherwise, you may lose data stored in extended
memory by drivers such as SMARTDrive.

In addition, when running Soft-ICE and SMARTDrive, do not
press CTRL+ALT+DEL until you are sure that your computer's
software has finished writing to disk. Otherwise, you might
lose data.

6.14 Ventura Publisher
----------------------
If you can't start a version of Ventura Publisher, make sure your
Ventura Publisher directory is within the first 70 characters of
the PATH command in your AUTOEXEC.BAT file.

7. DOUBLESPACE
==============

7.1  Manually Converting Your Disk-Compression Software to DoubleSpace
----------------------------------------------------------------------
To convert your disk-compression software manually, carry out the
following procedure.

NOTE If your computer uses XtraDrive disk compression, use its
uninstallation program to remove the compression, and then
install DoubleSpace.

1. Install MS-DOS 6 if you haven't already done so.

2. Use Microsoft Backup for MS-DOS to back up the files on your
   hard disk. If you didn't install it during Setup, see the chapter
   "Getting Started" for instructions on installing it.

3. If your Setup disks are compatible with drive A, insert
   Setup Disk 1, and restart your computer by pressing
   CTRL+ALT+DEL. After Setup displays the first screen,
   exit Setup by pressing F3 twice.

   If your Setup disks are not compatible with drive A,
   create a startup floppy disk for drive A by inserting Setup
   Disk 1 in drive B, and typing the following at the command
   prompt:

   b:setup /f

   When prompted, choose to install MS-DOS to a floppy disk
   in drive A. After Setup is finished, restart your computer
   by inserting your startup disk in drive A, and pressing
   CTRL+ALT+DEL.

4. Use the format command to format the drive that contains the
   file that stores all of your compressed files. If you don't know
   where this file is located, see your disk-compression
   documentation.

   If you are reformatting drive C, include the /S switch to transfer
   your system files.

5. If you formatted drive C, make sure Setup Disk 1 is in drive A
   or B, and type A:SETUP or B:SETUP at the command prompt.

    Follow the instructions on your screen.

6. After Setup is finished, install DoubleSpace by typing DBLSPACE
   at the command prompt. Follow the instructions on your screen.

7. Restore the files you backed up.

   NOTE
   When you run Microsoft Backup, you will have to reconfigure it
   again. Also, you will need to retrieve the catalog file from your
   backup floppy disks. To do so, choose the Catalog button in the
   Restore dialog box.

7.2 DoubleSpace Setup indicates that your computer is running an
    incompatible disk-caching program
----------------------------------------------------------------
If DoubleSpace Setup displays a message indicating your computer
is running an incompatible disk-caching program, carry out the
following procedure to install DoubleSpace:

1. Open your CONFIG.SYS file, and delete the line that contains the
   device command that loads your disk-caching program.

2. Make sure you have a line for the MS-DOS 6 SMARTDRV program.
   For example, if C:\DOS is your MS-DOS directory, add the
   following line:

   C:\DOS\SMARTDRV.EXE /DOUBLE_BUFFER

3. Save the file, and open your AUTOEXEC.BAT file.

   Make sure you have a line for the MS-DOS 6 SMARTDRV program.
   For example, if DOS is your MS-DOS directory, add the following
   line:

   C:\DOS\SMARTDRV.EXE /L

4. Save the file, and restart your computer by pressing
   CTRL+ALT+DEL. Then run DoubleSpace again.

7.3 Your compressed drive runs out of disk space
------------------------------------------------
If your compressed drive runs out of free disk space, you can
use the following techniques to free some space on that drive:

o Specify a higher estimated compression ratio for that drive.
o Enlarge that drive.
o Carry out the DEFRAG command on that drive.
o Carry out the DBLSPACE /DEFRAG /F and DBLSPACE /DEFRAG commands
  on that drive.

The rest of this section explains each technique.

Specifying A Higher Estimated Compression Ratio
-----------------------------------------------
If a compressed drive's estimated compression ratio is too small,
MS-DOS might report that there is no more free space on that drive,
when some space is in fact available. (Raising the estimated compression
ratio is most effective if the files you are trying to store are highly
compressible. It will have no effect if the drive really is out of space.)

To specify a larger estimated compression ratio:

1. Start the DoubleSpace program by typing DBLSPACE at the command
   prompt.

2. Select the compressed drive you want to change, and then choose
   the Change Ratio command from the Drive menu.

   DoubleSpace displays the Change Compression Ratio dialog box.

3. Specify a larger compression ratio, and then choose OK. For more
   information, choose the Help button.

You can also change the estimated compression ratio from the command prompt.
For more information, type HELP DBLSPACE /RATIO at the command prompt.

Enlarging a Compressed Drive
----------------------------
You can enlarge a compressed drive to make more space available on it.
Enlarging a compressed drive uses free space on the uncompressed drive
(the host drive).

To enlarge the compressed drive:

1. Start the DoubleSpace program by typing DBLSPACE at the command prompt.

2. Select the compressed drive you want to enlarge, and then choose
   the Change Size command from the Drive menu.

   DoubleSpace displays the Change Size dialog box. The New Free Space
   line shows how much free space the compressed and uncompressed drives
   will have if you choose OK.

3. Specify a smaller number for the New Free Space on the uncompressed
   drive. Notice that as you change this number, DoubleSpace adjusts
   the New Free Space amount for the compressed drive. When the New Free
   Space amount for both drives appears the way you want, choose OK.

   DoubleSpace enlarges the drive.

Carrying Out the DEFRAG Command on the Compressed Drive
-------------------------------------------------------
Sometimes, you can free additional space on a compressed drive by
carrying out the DEFRAG command on it. Although defragmenting files
does not free space on an uncompressed drive, it can sometimes free
space on a compressed drive.

Note: You might want to carry out this procedure overnight, since
      defragmenting a large or badly fragmented drive can take a long time.

To carry out the DEFRAG command on the compressed drive:

1. Start the Defrag program by typing the following at the command prompt:

      defrag /f

2. When the Defrag program starts, select the compressed drive, and
   then choose OK.

   Defrag fully optimizes your compressed drive, and then starts
   DoubleSpace to defragment the way files are stored on the compressed
   drive. During this extra optimization step, DoubleSpace frees as much
   space on the drive as possible. When DoubleSpace finishes defragmenting
   your drive, you will return to the command prompt.

Carrying Out the DBLSPACE /DEFRAG /F and DBLSPACE /DEFRAG Commands
on the Compressed Drive
------------------------------------------------------------------
You can sometimes free additional space on a compressed drive by
having DoubleSpace defragment that drive twice, once with and once
without the /F switch.

Note: You might want to carry out the following procedure overnight, since
      defragmenting a large or badly fragmented drive can take a long time.
      (To carry out the entire procedure overnight, create a batch file
      that contains both the commands in the procedure.)

To free space by having DoubleSpace defragment the drive twice:

1. Make the compressed drive your current drive.

2. At the command prompt, type the following command:

   dblspace /defrag /f

   DoubleSpace defragments the drive and fixes any errors it finds.

3. When DoubleSpace finishes, type the following command:

   dblspace /defrag

   DoubleSpace consolidates the free space on the drive so that
   there is as much free space as possible.

7.4 Your uncompressed drive runs out of disk space
--------------------------------------------------
If your uncompressed drive (host drive) runs out of free disk space, you
can enlarge it by reducing the size of any compressed drives that are
stored on that uncompressed drive. Of course, this will reduce the
amount of free space on the compressed drive(s).

To enlarge the uncompressed drive (host drive):

1. Start the DoubleSpace program by typing DBLSPACE at the command prompt.

2. Select the compressed drive whose size you want to reduce, and then
   choose the Change Size command from the Drive menu. (You need to select
   a compressed drive that is stored on the uncompressed drive that's
   out of space. To find out which compressed drives are stored
   on that uncompressed drive, type DBLSPACE /LIST at the command prompt.)

   DoubleSpace displays the Change Size dialog box. The New Free Space
   line shows how much free space the compressed and uncompressed drives
   will have if you choose OK.

3. Specify a larger number for the New Free Space on the uncompressed
   drive. Notice that as you change this number, DoubleSpace adjusts
   the New Free Space amount for the compressed drive. When the New Free
   Space amount for both drives appears the way you want, choose OK.

   DoubleSpace reduces the size of the compressed drive, which makes
   more free space available on the corresponding uncompressed drive.

7.5 DoubleSpace did not compress all of your files because
    the drive ran out of disk space
----------------------------------------------------------
If DoubleSpace indicates that it could not compress some
of your files because there was not enough disk space, carry
out the following procedure.

1. Type DBLSPACE at the command prompt.

2. To determine which drive is your uncompressed drive, choose
   Info from the Drive menu. Then choose Exit from the Drive
   menu.

3. Back up to floppy disks the files that were left uncompressed
   on the uncompressed drive.

4. Delete the files that were left uncompressed on the uncompressed
   drive.

5. Type DBLSPACE at the command prompt.

6. Choose Change Size from the Drive menu.

7. To increase the size of your compressed drive, decrease the size
   of your uncompressed drive. Choose OK.

7. Choose Exit from the Drive menu, and copy the backed-up files
   to your compressed drive. If you run out of space again, repeat
   steps 5 through 7 until the compressed drive is large enough.

7.6 Removing DoubleSpace From Your Computer
--------------------------------------------
There is no method for automatically removing DoubleSpace.
You can only remove it manually. To do so, carry out the
following procedure:

1. Back up the files on the compressed drive. If you're using
   a backup program on the compressed drive, make sure the
   program files are on another drive or are on a floppy disk.

   The program files include the following:

   MSBACKUP.EXE   MSBACKUP.OVL   MSBACKUP.INI   MSBACKDB.OVL
   MSBACKDR.OVL   MSBACKFB.OVL   MSBACKFR.OVL   MSBACKFG.OVL
   DEFAULT.SET    MSBACKUP.LOG   MSBACKUP.RST

2. Type DBLSPACE at the command prompt.

3. Choose the Info command from the Drive menu. Note on which
   uncompressed drive the compressed drive is stored.

4. Copy the COMMAND.COM file from your compressed drive to the root of
   your uncompressed drive.

5. To delete your DoubleSpace files, make your uncompressed drive current,
   and then type the following at the command prompt:

   deltree dblspace.*

6. Restart your computer by pressing CTRL+ALT+DEL at the command
   prompt.

7. Restore your backed-up files. If your program files are on a floppy
   disk, copy them to the hard disk.

   NOTE
   If you didn't retain a copy of your catalog file, you may need to
   retrieve it from your backup floppy disks. To do so, choose the
   Catalog button in the Restore dialog box.

7.7 DoubleSpace and Windows Permanent Swap Files
------------------------------------------------
When you install DoubleSpace, it checks for the existence of a Windows
permanent swap file. If DoubleSpace finds a permanent swap file,
it moves the file to your uncompressed drive.

If you install Windows after installing DoubleSpace, or if you use
Control Panel to change the location of your permanent swap file, your
swap file might end up being located on a compressed drive. (When you
specify a drive for your permanent swap file, Windows allows you to
choose a compressed drive.)

If your Windows permanent swap file is located on a compressed drive, then
Windows displays the message "The permanent swap file is corrupt" when it
starts.

To solve this problem:

1. At the "Permanent swap file is corrupt" screen, type Y in response
   to the question "Do you want to delete this swap file?", and
   then press ENTER.

2. After Windows starts, open Control Panel, and then double-click the 386
   Enhanced icon.

3. Choose the Virtual Memory button.

   Windows displays a dialog box saying that a corrupt swap file was found,
   and asks if you want to set the file's length to zero.

4. Choose the Yes button. Windows displays another Virtual Memory dialog box.

5. Choose the Change button. Windows displays swap-file settings.

6. In the Drive list box, select a drive that is not compressed. In the
   Type list box, select "Permanent."

   If your uncompressed drive does not have enough free space to create a
   permanent swap file, create a temporary swap file on either your
   compressed or uncompressed drives. (For information about freeing
   space on your uncompressed drive, see the topic "Your uncompressed
   drive is out of disk space" later in this file.)

   When you have finished specifying swap-file settings, choose OK twice.
   Windows displays a dialog box asking if you want to restart Windows now.

7. Choose the Restart Windows button.

7.8 If EXTDISK.SYS displays a warning about drive letters
---------------------------------------------------------
If you use DoubleSpace and your CONFIG.SYS file loads the EXTDISK.SYS
device driver, EXTDISK.SYS displays the following message when it loads:

   WARNING: EXTDISK.SYS is not the first device driver to assign drive
	    letters.  Physical hard drive letters will not be contiguous.

The EXTDISK.SYS driver still works properly. It displays this message
because it expects to be the first module to assign drive letters,
but since DBLSPACE.BIN loads before the CONFIG.SYS file and assigns
some drive letters, EXTDISK.SYS is no longer first. (EXTDISK.SYS
displays the message regardless of when the DBLSPACE.SYS device
driver is loaded in the CONFIG.SYS file.)

7.9 You Need a Special Device Driver to Use a Compressed Drive
--------------------------------------------------------------
If you need a special device driver to use a drive (other than your
startup drive), you can still compress that drive by using DoubleSpace.
However, when you start your computer, DoubleSpace will not automatically
mount that drive because it cannot gain access to it during system startup.

Note: If your startup drive requires a special device driver, see
      the following section for information about using DoubleSpace with
      that drive.

To instruct DoubleSpace to mount a compressed drive that requires a special
device driver, add a DBLSPACE /MOUNT command for that drive to the beginning
of your AUTOEXEC.BAT file. For example, if the drive that requires the
device driver is drive D, add the following command to the beginning of
your AUTOEXEC.BAT file:

  DBLSPACE /MOUNT D:

7.10 You Need a Special Device Driver to Use Your Startup Drive
---------------------------------------------------------------
If your startup hard disk drive requires a device driver in your CONFIG.SYS
file, it is recommended that you do not compress that drive. If you do,
your computer will not start properly, since DoubleSpace will be unable
to provide access to your startup drive. (This is because MS-DOS loads
DBLSPACE.BIN, the portion of MS-DOS that provides access to compressed
drives, before starting any of the device drivers in your CONFIG.SYS file.)

To install DoubleSpace on a computer with a startup drive that requires a
special device driver, have DoubleSpace Setup compress a drive other than
your startup drive, or have DoubleSpace Setup create a new compressed
drive using free space on any existing drive.

To install DoubleSpace if your startup drive requires a device driver:

1. Start DoubleSpace Setup by typing DBLSPACE at the command prompt,
   and choose Custom Setup.

2. If you have only one hard disk drive, choose "Create new empty
   compressed drive," and then follow the instructions on your screen
   to complete DoubleSpace Setup. DoubleSpace will create a new empty
   compressed drive by using free space on your startup hard disk
   drive.

   If you have more than one hard disk drive, choose "Compress existing
   drive," and then select a hard disk drive other than your startup 
   hard disk drive. (Or, choose "Create new empty drive" and select
   any hard disk drive.) Follow the instructions on your screen to complete
   DoubleSpace.

7.11 Defragmenting Uncompressed Drives After Changing File Attributes
---------------------------------------------------------------------
You can safely defragment both your compressed or uncompressed drives,
using MS-DOS Defragmenter or another defragmentation program, as long
as you do not change the file attributes of your compressed volume files.

7.12 Files DoubleSpace Cannot Compress
--------------------------------------
Some files (such as .ZIP files) are already compressed. DoubleSpace
might not be able to compress such files any further.

Encrypted data files, such as the Microsoft Mail 3.0 .MMF file, are
not compressible and will be stored in uncompressed form, even if
you store such files on a compressed drive.

7.13 DoubleSpace and Microsoft Mail 3.0 .MMF Files
--------------------------------------------------
If you use Microsoft Mail 3.0, you might want to make sure your mail
(.MMF) file is located on an uncompressed drive. Mail works properly
if the .MMF file is located on a compressed drive; however, your system
might run faster if the file is located on an uncompressed drive.

Microsoft Mail normally stores the .MMF file in encrypted, compressed
form. Because DoubleSpace cannot compress such a file, there is no
advantage in storing the .MMF file on a compressed drive.

If your uncompressed drive does not have enough space to accommodate
your .MMF file, you can reduce the size of your compressed drive.
To do this, follow the procedure in section 7.4, "Your uncompressed
drive is out of disk space."

7.14 Defragmenter Runs Out Of Memory While You Are Compressing a Drive
----------------------------------------------------------------------
If the Defragmenter runs out of memory while you are compressing a drive,
exit DoubleSpace, and then carry out the procedures in "An MS-DOS-based
program displays an out-of-memory message" in the chapter "Diagnosing
and Solving Problems" of the MICROSOFT MS-DOS 6 USER'S GUIDE.

If the Defragmenter still runs out of memory after you have tried
these procedures, your computer might have too many files for the
Defragmenter to reorganize the files on your hard disk. For the
program to work correctly, you might need to delete some files or
move them to a floppy disk or a network drive.
