
 README.TXT -- NOTES ON PC DOS 6.3

 This README.TXT file contains important information about PC DOS 6.3.

 T A B L E   o f  C O N T E N T S
 --------------------------------

 1.0  Setup
      1.1  Unformatted Hard Disks
      1.2  SETVER.EXE
 2.0  Networks
      2.1  Lantastic
 3.0  IBM AntiVirus Updates
 4.0  DOS Commands
      4.1  CPBACKUP
           4.1.1 Running POWER.EXE
           4.1.2 IBM Tape device support
           4.1.3 Backup Confidence Test
      4.2  E Editor
      4.3  FORMAT
      4.4  LABEL
      4.5  MEM
      4.6  RAMSETUP/RAMBoost
           4.6.1 Running RAMBOOST with Programs which require EXPANDED memory
      4.7  SMARTDRV
      4.8  UNDELETE
      4.9  FILES.TX_
      4.10 PenDOS
           4.10.1 Video Mode Support with DOS v6.3
           4.10.2 Using Central Point Utilities & PenDOS with DOS v6.3
           4.10.3 Using PC DOS Defragmenter utility & PenDOS with DOS v6.3
           4.10.4 Running PenDOS 2.2 with PC DOS 6.3
      4.11 DOSHELP
      4.12 MOUSE
 5.0  Hardware and Device Drivers
      5.1  PS/2 Server Password mode
      5.2  PS/1 Quad Startup Screen
 6.0  Windows
 7.0  DR DOS
 8.0  PCMCIA
      8.1  PCMSS - Socket Services
      8.2  PCMINFO - Information Utility
      8.3  Network Support Limitation
      8.4  Modem Suspend and Resume on IBM ThinkPADs
      8.5  PCMCIA & Card Upper Memory Requirements
      8.6  Supported PCMCIA Cards
 9.0  Compression
      9.1  CVFs Less Than 32MB
      9.2  Error Shrinking or Expanding CVFs
      9.3  CPBACKUP
      9.4  COMPRESSION with single floppy disk systems
      9.5  DISKCOPY and DISKCOMP
      9.6  MS-DOS 6.2 Compression
      9.7  Norton Disk Doctor (NDD.EXE)


  1.0  SETUP
  ==========

  1.1 Unformatted Hard Disks
  --------------------------
  When installing, SETUP gives you the option to format unformatted
  partitions.  When running SETUP as an application under DOS 3.3 and below,
  the partitions may not be formatted.  To work around the problem, boot
  from the SETUP diskette #1 or format the partitions with your previous
  version of DOS.


  1.2 SETVER.EXE
  --------------
  In order for SETVER to get updated correctly during installation, you must
  make sure the "Previous DOS path" indicated is correct.  If it does not
  point to the correct path, then SETUP does not find a SETVER to update.


  2.0  Networks
  =============

  2.1 Lantastic
  -------------
  Users of Lantastic Lancache may experience trouble with warm boots
  (Ctrl+Alt+Del) with EMM386 running.  If your system fails to warm boot,
  you will be forced to turn the system power switch OFF and ON to cold boot
  when running EMM386 and Lancache.


  3.0  IBM AntiVirus Updates
  ==========================
  The virus protection in DOS 6.3 is comprehensive protection for all known
  viruses as of DOS 6.3's release date.  However, over time, new viruses are
  created and the user might not be protected from these newer viruses.  For
  the most up-to-date virus protection, return the coupon provided in the
  User's Guide for continuous updates on new viruses.


  4.0  DOS Commands
  =================

  4.1 CPBACKUP
  ------------

  4.1.1 Running POWER.EXE
  -----------------------
  If you are running POWER.EXE (the DOS Advanced Power Management device
  driver), it might cause the performance of CPBACKUP to degrade.  To avoid
  this, disable power management before running CPBACKUP by entering the
  following at the DOS command line:

                POWER OFF

  After you have finished backing up your system, remember to re-enable
  power management.


  4.1.2 IBM Tape device support
  -----------------------------
  When configuring tape devices for CPBACKUP, the software attempts to
  determine what type of device is attached. The following table
  provides a cross reference between IBM tape devices and their
  corresponding CPBACKUP equivalent.

  IBM Tape Device Name/Model        CPBACKUP Tape Device Name/Model
  ==========================        ===============================
  IBM 1.2GB 3450-001                Tandberg IBM 4100
  IBM 2.0GB 4mm 3440-001            IBM35480A
  IBM 2.3GB 8mm 3532-023            EXABYTE EXB-8200
  IBM 5.0GB 8mm 3445-001            EXABYTE IBM-8505

  4.1.3 Backup Confidence Test
  ----------------------------
  On some machines the automatic disk-sensing may not work properly, so
  if during the compare phase of the Backup Confidence Test your
  system appears to pause indefinitely, eject the diskette and then
  put the diskette back in.  This should clear up the indefinite pause
  if it occurs.

  4.2 E Editor
  ------------
  The online help for the E Editor does not list all the commands available.
  See the User's Guide for a full description.


  4.3 FORMAT
  ----------
  If you cannot use the FORMAT command to format an unformatted disk, try
  using the /U switch to instruct FORMAT to do an unconditional format.

  If you have Stacker disk compression and receive the message "Insert DOS
  disk in drive A:" when doing a FORMAT /S do the following.  Boot from your
  hard disk, insert the DOS 6.3 SETUP diskette #1 into drive A:, at the DOS
  prompt type SYS A:  C:


  4.4 LABEL
  ---------
  LABEL does not rename a volume label when the volume is shared and has the
  same volume label name as a current file on the volume and the file is
  being used in the following manner:
    LABEL < FOO (where FOO is the new volume label)


  4.5 MEM
  -------
  The pause parameter (/P) may not pause the screen on systems with a BIOS
  dated prior to 1985.


  4.6  RAMSETUP/RAMBoost
  ----------------------
  If sometime in the future you add or remove an adapter from your Hardware
  system, it is recommended that you rerun RAMSETUP.  But before you do so,
  remove the EMM386.EXE statement from your CONFIG.SYS file and reboot your
  computer and run RAMSETUP.  It will do a memory analysis of your hardware
  system and create a new EMM386.EXE statement for your CONFIG.SYS.


  4.6.1  Running RAMBOOST with Programs which require EXPANDED memory
  -------------------------------------------------------------------
  If your machine previously used EMM386.EXE to simulate expanded memory by
  using extended memory, then RAMBoost can also be used to provide full
  memory management.  To do so and to also move the compression device
  driver into upper memory, do the following:

   1. In the CONFIG.SYS, REM the EMM386 statement and add
      DEVICE=DBLSPACE.SYS.
   2. Reboot.
   3. Run RAMSETUP.
   4. In RAMSETUP, choose ADVANCED.
   5. Choose OPTIONS.
   6. Make the EMS size 2048 (or so).
   7. ENABLE EMS.
   8. Choose OK, OK, OK.
   9. Choose REBOOT.
  10. RAMSETUP will enable RAMBoost and include a fairly lengthy EMM386
      statement.


  4.7 SMARTDRV
  ------------
  The SMARTDrive (disk caching) program has been enhanced and renamed.  If
  you are upgrading DOS, SETUP deletes the SMARTDRV.SYS statement in your
  CONFIG.SYS file.  If you want to continue to have SMARTDRV disk caching
  then you must add the SMARTDRV command to your AUTOEXEC.BAT file.  SETUP
  does not do this for you.


  4.8 UNDELETE
  ------------
  Do not use the UNDELETE command in the following circumstances:

  * With other programs when they are active.
  * With the Shift+Enter key combination in Windows or DOS Shell.
  * With Task Swapper in DOS Shell.


  4.9 FILES.TX_
  -------------
  This file contains the list of files that come with DOS and are grouped
  under their function heading.  Also, for each of the files listed it
  indicates where the file was installed and a description of its function.
  This file is compressed and is found on diskette number 2.  Use EXPAND to
  make the file readable.

  Example:  EXPAND A:FILES.TX_ C:\DOS\FILES.TXT


  4.10 PenDOS
  -----------
  The PENDOS.BAT file created by SETUP contains a MODE COM1:9600,N,8,1
  statement that is needed by serial attached pen tablets.  If your tablet
  is not serial attached, the MODE statement can be deleted from PENDOS.BAT.

  If you have a Kurta XGT Opaque Tablet, adjust your tablet to the following
  options:

      1) Select ALT, F4, F5 and align the tablet
      2) Emulation/Compatibility   P-KEY       ->  P1
                                   Emulation   ->  KURTA IS/ONE
      3) Format                    Binary      ->  B3
         Other Parameters          Data Bits   ->  8
                                   Parity      ->  none
                                   Baud Rate   ->  19200
                                   Resolution  ->  1016 LPI/40 LPMM
                                   Output rate ->  Max.
                                   Origin      ->  Lower Left
      4) Save to                   P1
         Exit to                   P1


  4.10.1 Video Mode Support with DOS v6.3
  ---------------------------------------
  PenDOS is designed to operate in the following standard VGA display modes.


              Video Mode              Virtual Screen Size
              ---------               -------------------
                 2                     640 x 200 TEXT
                 3                     640 x 200 TEXT
                11                     640 x 480 GRAPHICS (MCGA NOT SUPPORTED)
                12                     640 x 480 GRAPHICS

  PenDOS operates in other display modes but the compatibility level and
  application functions are severely restricted.

  Most of todays off-the-shelf applications were not designed with notepad
  computers in mind.  Installing these applications with the color display
  option sometimes results in the application objects not being visible.
  This can be resolved by installing the application with the display option
  set to LCD or B&W screen.


  4.10.2 Using Central Point Utilities & PenDOS with DOS v6.3
  -----------------------------------------------------------
  Central Point's UNDELETE, BACKUP and SCHEDULE utilities can be run in
  either graphic or text mode.  When running these utilities in graphic mode
  with PenDOS active, video corruption will occur when invoking the PenDOS
  Writing Window or "pop-up" keyboard.

  To avoid this problem, run the Central Point utilities in text mode.

         EXAMPLE:  C:\DOS\UNDELETE /nf
                   C:\DOS\SCHEDULE /nf
                   C:\DOS\CPBACKUP /nf

  When launching the Central Point Utilities from within the DOSSHELL, you
  need to edit the DOSSHELL.INI file to avoid video corruption (this file
  resides in your DOS directory) using an editor.

      EXAMPLE: for the CENTRAL POINT SCHEDULER (E DOSSHELL.INI)

  }
  program =
  {
  help = The Scheduler lets you schedule any program to run at a set time
  and date.  You can schedule any executable command accepted at the DOS
  prompt.  The CPSCHED.EXE (TSR) should be loaded from the Autoexec.bat
  before being run from the SHELL.
     screenmode = text
     alttab = enabled
     altesc = enabled
     ctrlesc = enabled
     prevent = disabled
     command = SCHEDULE <=============== change SCHEDULE to SCHEDULE /nf
     title = Central Point Scheduler
     pause = disabled
  }


  4.10.3 Using PC DOS Defragmenter utility & PenDOS with DOS v6.3
  ---------------------------------------------------------------
  The Defragmenter utility can be run in either graphic or text mode.  When
  running this utility in graphic mode with PenDOS active, video corruption
  will occur when invoking the Writing Window or "pop-up" keyboard.

  To avoid this problem, run the Defragmenter utility in text mode.

         EXAMPLE:  C:\DOS\DEFRAG /G0


  4.10.4 Running PenDOS 2.2 with PC DOS 6.3
  -----------------------------------------
  The "MIN" statement is recommended on the EMM386 line in the CONFIG.SYS
  when running under PC DOS 6.3.  This parameter prevents any memory
  conflicts that may occur while running PenDOS TSRs under DOS 6.3.

        Sample CONFIG.SYS file
        ----------------------
          Buffers=48,8
          Files=30
          Dos=HIGH,UMB
          Device=C:\DOS\HIMEM.SYS
          Device=C:\DOS\EMM386.EXE MIN=128 RAM AUTO
          Devicehigh=C:\DOS\SYSTEM\PENDEV.SYS


  4.11 DOSHELP
  ------------
  DOSHELP.HLP will not get updated if the "Previous DOS path" is incorrect.


  SETUP /E does not update the existing DOSHELP.HLP file in the DOS
  directory.  You can either use EXPAND to expand DOSHELP.HL_ from diskette
  number 1 to your DOS subdirectory and overwrite your existing DOSHELP.HLP
  file, or you can edit the existing DOSHELP.HLP in your DOS directory
  using E.  To edit, load this file and the DOSHELP.HLP file.  Mark the
  following lines, switch to the HLP file, and copy the lines in
  alphabetical order to the DOSHELP.HLP file.  Be sure to include both
  lines for the commands that need two lines.  When you are done copying
  all the new lines, save DOSHELP.HLP.

    MOUNT    Assigns a specified DOS driver letter to a SuperStor/DS disk.
    RTOOL    Performs an integrity check of the compressed volume file(CVF).
    SSTOR    Full-screen utility to create, mount and delete compressed
             drives.
    SSUNCOMP Uncompress a SuperStor/DS compressed drive.
    SSUTIL   Full-screen utility for maintaining compressed drives.
    UDEOFF   Removes UDEON from memory.
    UDEON    Universal Data Exchange allows you to use compressed disks on
             other systems.
    UNMOUNT  Releases a SuperStor/DS disk that was mounted from its
             assigned drive letter.

  4.12 MOUSE
  ----------
  If you experience a "wild mouse" problem with MOUSE v9.01 after exiting
  MS Windows v3.1 and running an application like DEFRAG or SCHEDULER;
  exit the application and do a 'MOUSE ON' or do it immediately after you
  exit Windows.


  5.0  Hardware and Device Driver
  ===============================

  5.1 PS/2 Server Password Mode
  -----------------------------
  If your PS/2 appears to hang when booting, you may have the server
  password mode set.  Try entering your password and see if the computer
  will resume booting.  Also be aware that F5-Clean Boot, F8-Interactive
  Boot, ?=, and the startup menus all require keyboard input and do not
  function until your password is entered.

  Other DOS utilities and device drivers might also require keyboard input.
  If your PS/2 appears to hang when booting, type in your password and press
  the Enter key.


  5.2 PS/1 Quad Startup Screen
  ----------------------------
  Upgrading on a PS/1 to DOS 6.3 will enable the PS/1 Quad Startup Screen.
  If you no longer wish to use the Quad screen, you can disable it by
  editing your AUTOEXEC.BAT file and add 'REM ' to the beginning of the line
  with 'RSSTUB.COM' and save the file.


  6.0  Windows
  ============
  If you are running Windows, set STACKS=9,256 in the CONFIG.SYS file.


  If you have an 80386 or 80486 computer with extended memory and a Super
  VGA display, you can use the MONOUMB.386 file, in conjunction with
  RAMBoost, to conserve conventional memory for running programs.

  To conserve memory if you have a Super VGA display:

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

  2. Add a DEVICE command for the MONOUMB.386 file, which is located in
     your DOS directory.  For example, if your DOS files are in C:\DOS, add
     the following line to this section:

      DEVICE=C:\DOS\MONOUMB.386

  3. Save the file, and restart your computer.


  7.0  DR DOS
  ===========
  If your CONFIG.SYS file use any conditional commands such as the "?" or
  GOTO commands, remove them and adjust the order of commands in your
  startup files accordingly.

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

  After Setup is complete, DOS displays an "Unrecognized command" message on
  your screen for each command in your CONFIG.SYS file that is not a valid
  DOS command.  Remove these commands from your CONFIG.SYS file.


  8.0  PCMCIA
  ===========

  8.1 PCMSS - Socket Services
  ---------------------------
  PCMCIA Card Services (PCMCS.EXE) requires a compatible Socket Services
  driver.  The Socket Services driver is usually provided with your system
  hardware.  For the IBM system hardware listed below, Socket Services is
  provided with DOS and copied to the DOS directory when you choose PCMCIA
  support during SETUP.  The systems are:  IBM ThinkPAD 720 and 720C, and
  the IBM PS/2 E.  If you have one of these systems and you want to switch
  the PCMCIA device drivers that are provided with DOS 6.3 then use one of
  the following examples:

  Example CONFIG.SYS for IBM ThinkPAD 720
  ---------------------------------------
      rem DEVICE=C:\IBMDSS02.SYS
      rem DEVICE=C:\IBMDOSCS.SYS
      rem DEVICE=C:\DICRMU02.SYS
      DEVICE=C:\DOS\PCMSS.EXE /APOFF
      DEVICE=C:\DOS\PCMCS.EXE  /ADDR=C0 /NOPM
      DEVICE=$ICPMDOS.SYS /MODEMOFF
      DEVICE=C:\DOS\PCMSCD.EXE /BEEP /COM=4 /RS=4
      DEVICE=C:\DOS\PCMATA.SYS /1
      DEVICE=C:\DOS\POWER.EXE

  The following are the titles for the above programs:

      PCMSS.EXE is the DOS Socket Services Driver
      PCMCS.EXE is the DOS Card Services Driver
      IBM ThinkPAD 720 Suspend and Resume Driver
      PCMSCD.EXE is DOS Super Client Driver
      PCMATA is the DOS Virtual Drive Emulator
      DOS POWER Management Driver

  Example CONFIG.SYS for IBM PS/2 E
  ---------------------------------
      DEVICE=C:\DOS\PCMSS.EXE /LOCK
      DEVICE=C:\DOS\PCMCS.EXE /ADDR=C0 /IRQ=10 /NOAUTOLK
      DEVICE=C:\DOS\PCMSCD.EXE /BEEP /COM=4 /RS=4
      DEVICE=C:\DOS\PCMATA.SYS /1

  Example CONFIG.SYS for IBM ThinkPAD 350
  ---------------------------------------
      DEVICE=C:\DOS\HIMEM.SYS
      DOS=HIGH
    * DEVICE=C:\DOS\EMM386.EXE NOEMS X=C000-C0FF X=D000-D3FF
      DEVICE=C:\DOS\POWER.EXE
      DEVICE=C:\DOS\PCMSS.EXE  /S0=1
      DEVICE=C:\DOS\PCMCS.EXE
      DEVICE=C:\DOS\PCMSCD.EXE /BEEP /COM=4 /RS=4
      rem DEVICE=C:\DOS\PCMATA.SYS /1

  There are further details in the User's Guide and Command Reference.
  Remember that Socket Services must be loaded before Card Services.
  * see Section 8.5 below for additional ranges required for EMM386.EXE.

  PCMSS.EXE
  ---------
  Provides PCMCIA Socket Services 2.01 support.

  PCMSS can be loaded as a terminate-and-stay-resident program from the DOS
  command prompt or the AUTOEXEC.BAT file, or as a device driver from the
  CONFIG.SYS file.

    Type: DOS, External

    Syntax:
    When loaded from the DOS command prompt or the AUTOEXEC.BAT file,
    use the following syntax.

      [drive:][path]pcmss.exe [/APOFF] [/RW=n] [/RS=n] [/LOCK] [/S0=m]

    When loaded from the CONFIG.SYS file, use the following syntax.

      device=[drive:][path]pcmss.exe [/APOFF] [/RW=n] [/RS=n] [/LOCK] [/S0=m]

    Parameter:

       [drive:][path]  Specifies the location of PCMSS.EXE.

    Switches:

       /APOFF          Turn autopower off.  This switch is for Micro Channel
                       systems and must be specified on the ThinkPad 720
                       and 720C.

       /RS=n           Specifies the reserve socket option that
                       prevents Socket Services from colliding
                       with other dedicated PCMCIA software that
                       is accessing the socket hardware directly.
                       The n specifies the socket number (starting
                       at zero) of the socket to reserve.  A maximum
                       of two sockets can be reserved by specifying
                       either: /RS=0,1 or /RS=0 /RS=1.

       /RW=n           Specifies the reserve window option that
                       allows either I/O or memory windows on a
                       socket.  The n specifies the window number
                       (starting at zero) on the first socket and
                       continuing through the last window on the
                       last socket.  There is no distinction
                       between I/O and memory windows because the
                       number and type of windows is controller
                       specific.  A maximum of two windows can
                       be reserved by specifying /RW=3,5 or /RW=3 /RW=5

       /LOCK           Enables socket locking features (manual and
                       automatic) on sockets that have the ability
                       to lock the card(s) in the socket(s).  This
                       is applicable to the PS/2 E hardware system.

       /S0=m           Specifies the number of sockets.


  8.2 PCMINFO - Information Utility
  ---------------------------------
  For some older (v1.0) SRAM cards that do not comply with the new
  specification, PCMINFO (Information Utility) may show the card powered
  down, but the card may be configured and operational.


  8.3 Network Support Limitation
  ------------------------------
  There is currently a limit of one network card being configured on
  the system at a time.  This applies to Ethernet, Token Ring, and
  3270 PCMCIA Cards.


  8.4 Modem Suspend and Resume on IBM ThinkPADs
  ---------------------------------------------
  The suspend and resume function on IBM 720 and 750 ThinkPADs is provided
  by the $ICPMDOS.SYS driver that is shipped with the system.  If you are
  using a modem on one of these systems then you need to add /MODEMOFF (must
  be capitalized) to the end of the DEVICE=$ICPMDOS.SYS statement in your
  CONFIG.SYS (ie.  DEVICE=C:$ICPMDOS.SYS /MODEMOFF) and add /NOPM to Card
  Services (PCMCS.EXE).


  8.5 PCMCIA & PC Card Upper Memory Requirements
  ----------------------------------------------
   =======================================================================
   DRIVER/PCMCIA        UPPER MEMORY        DEFAULT         EMM386 EXCLUDE
       CARD               REQUIRED                             REGIONS
   =======================================================================
   PCMCS.EXE                 4K            /ADDR=C0          X=C000-C0FF
   PCMFDD.EXE               16K            /ADDR=D0          X=D000-D3FF
   PCMATA.SYS               16K            /ADDR=D0          X=D000-D3FF
   IBM Ethernet             16K                              X=D400-D7FF
   IBM 3270                  8K                              X=CE00-CFFF
   IBM Token Ring           24K                              X=D000-D1FF and
                                                             X=D800-DBFF

  8.6 Supported PCMCIA Cards
  --------------------------
  To see the list of cards supported by the Super Client Driver (PCMSCD.EXE)
  enter PCMSCD /CARDS at the DOS command line.

  PCMATA supported cards at the time of release are:
   IBM Thinkpad SSF Card
   Sundisk 10MB Drive
   Western Digital Caviar Ultra Lite 40MB (PCMCIA Intelligent Drive)
   Hewlett-Packard KittyHawk 20MB Drive
   Seagate ST7053P 42MB Drive
   Ministor 1.8" M42P (42MB)
   Maxtor 105MB PCMCIA HDD
   IBM PCMCIA Memory Card (SRAM) 1MB, 2MB and 4MB

  At the time of this release, PC DOS 6.3 does not currently support Flash
  Memory Cards.

  If your card is not listed here, then use the software (which may be referred
  to as a Client driver) provided with the card.

  9.0 Compression
  ===============

  9.1 CVFs Less Than 32MB
  -----------------------
  If you compress a hard disk to a size below 32MB, the Actual bytes listed
  in SSTOR's Statistics will list the size larger than 32MB.  This is normal
  which allows you to shrink and expand the CVF beyond 32MB.


  9.2 Error Shrinking or Expanding CVFs
  -------------------------------------
  If you receive an error when trying to shrink or expand a CVF, one
  possible reason is the CVF is fragmented.  You should run DEFRAG against
  the host drive of the CVF.

  1. Change to the host drive of the CVF and use ATTRIB to remove the
     attributes  on the CVF, e.g. ATTRIB -R -S -H DBLSPACE.000.
  2. Now run DEFRAG on the drive using the fully optimize switch, e.g.
     DEFRAG d: /F, where d: is the host drive.
  3. Reboot the system to restore the attributes on the CVF.


  9.3 CPBACKUP
  ------------
  Backing up to a compressed floppy disk with Central Point Backup is
  possible with the following exception noted.  The LOW speed backup option
  will backup to the compressed floppy and data will be compressed.  (There
  is probably not much gain here as the data is compressed by backing up
  already.) Should the user select the HIGH speed option for backup,
  because DMA is used to write to the floppy, the diskette is written in an
  uncompressed format.  The data is still fine, but the diskette is no
  longer compressed.


  9.4 COMPRESSION with single floppy disk systems
  -----------------------------------------------
  On machines with a compressed, single floppy diskette system, drive B will
  become the unmounted drive A.  Hence, executing the command COPY A:  B:
  will actually perform a copy on the same disk.  If you need to copy from
  one floppy to another floppy, first copy the file to your hard drive, and
  then copy the file from your hard drive to the other floppy.  This will
  apply to all commands that perform floppy disk functions from and to the
  same drive, such as: COPY, XCOPY, FC, COMP, MOVE, REPLACE.


  9.5 DISKCOPY and DISKCOMP
  -------------------------
  The DISKCOPY and DISKCOMP will work with compressed or uncompressed disks.
  Since DISKCOPY will create an exact duplicate of the source disk, the
  target disk will become compressed if the source is compressed, or it will
  be uncompressed if the source is uncompressed.

  To do a DISKCOPY on a machine with only one floppy, simply type the
  command:

   DISKCOPY A: B:


  9.6  MS-DOS 6.2 Compression
  ---------------------------
  If you are utilizing MS-DOS 6.2 with disk compression, you must
  install IBM PC DOS 6.3 with disk compression.

  9.7  Norton Disk Doctor (NDD.EXE)
  ---------------------------------
  If you are running Norton Disk Doctor version 7.0 against a CVF
  that is protected by a password, NDD may report that the CVF is
  seriously damaged.   In reality, the CVF may not be damaged at all.
  When running NDD against a password-protected CVF, first remove the
  password.

