readme.txt

DOS的一些基础工具

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If you currently use DoubleSpace, you can continue using it with MS-DOS 
6.22. Or, you can convert your system and all your DoubleSpace drives to 
DriveSpace.

NOTE  If you purchased the English version of the MS-DOS 6.22 Upgrade, 
      you can obtain DoubleSpace conversion by sending in the enclosed 
      coupon; if you purchased the MS-DOS 6.22 Step-Up or non-English 
      version of MS-DOS 6.22, your version of MS-DOS 6.22 already includes 
      DoubleSpace conversion.)

To convert your system from DoubleSpace to DriveSpace:

1. Back up the data on each DoubleSpace drive, if you have not already
   done so.

2. Type DRVSPACE at the command prompt, and then follow the instructions 
   on your screen. 
   
   DriveSpace converts all mounted DoubleSpace drives to DriveSpace format,
   and also converts your system to run DriveSpace instead of DoubleSpace.

NOTE  The conversion process can take a long time, especially if your 
      DoubleSpace drives contain a lot of data. You might want to plan
      to carry out the conversion process overnight.

7.2 Converting Your XtraDrive Disk-Compression Software
    to DriveSpace
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If your computer uses XtraDrive disk compression, use its
uninstallation program to remove the compression, and then
install DriveSpace.

7.3  Converting Stacker 3.1 Software to DriveSpace
--------------------------------------------------
If your drive has been compressed using Stacker version 3.1, carry
out the following procedure to remove Stacker 3.1 and install
DriveSpace. (If you use Stacker 2.x or 3.0 software, carry out 
the procedure in section 7.4 instead.)

1. Use Stacker's UNSTACK command to unstack all your Stacker drives.
   (If you have floppy disks compressed by using Stacker, either
   unstack them now or make sure they were configured using Stacker's
   StackerAnywhere feature.)

2. Change to the root directory of your startup hard disk drive,
   and then type the following commands:

   ATTRIB -R -H -S STACKER.INI
   ATTRIB -R -H -S DRVSPACE.BIN
   DEL STACKER.INI
   DEL DRVSPACE.BIN
   
3. Restart your computer.

4. Run DriveSpace Setup by typing DRVSPACE at the command prompt.

7.4  Converting Other Disk-Compression Software to DriveSpace
-------------------------------------------------------------
If you are not using Stacker 3.1 disk compression or XtraDrive 
disk compression, carry out the following procedure to convert 
your disk-compression software to DriveSpace.

1. Install MS-DOS 6.22 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 Backup for MS-DOS during Setup,
   see the chapter "Getting Started" in the MICROSOFT MS-DOS USER'S
   GUIDE for instructions on installing it.

3. If your Setup disks are compatible with drive A, insert
   Setup Disk 1 in drive A, and restart your computer. After
   Setup displays the first screen, quit Setup by pressing F3 twice.

   If your Setup disks are not compatible with drive A,
   create a startup floppy disk for drive A. To do this, insert
   Setup Disk 1 in drive B, and a blank floppy disk in drive A.
   Then type B:SETUP /F at the command prompt.
  
   When prompted, choose to install MS-DOS on the floppy disk
   in drive A. After Setup is finished, leave the disk in drive A,
   and restart your computer.

4. Use the FORMAT command to format the drive that contains the
   file that contains 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
   system files to it.

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 complete, install DriveSpace by typing DRVSPACE
   at the command prompt. Follow the instructions on your screen.

7. Use Backup for MS-DOS to restore the files you backed up.

   NOTE  When you run Microsoft Backup, you will have to configure 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.

7.5 DriveSpace Setup indicates that your computer is running an
    incompatible disk-caching program.
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If DriveSpace Setup displays a message indicating your computer is
running an incompatible disk-caching program, open your CONFIG.SYS or
AUTOEXEC.BAT file, and delete the command that loads your
disk-caching program. If you want to use a disk cache, add a line for
the MS-DOS 6.22 SMARTDRV program in your AUTOEXEC.BAT file. For example,
if your MS-DOS files are in a directory named DOS, add the following
line:

C:\DOS\SMARTDRV.EXE

Quit your text editor, and restart your computer. Run DriveSpace again.

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

o Enlarge that drive.

o Carry out the DRVSPACE /DEFRAG /F and DRVSPACE /DEFRAG commands
  on that drive.

The rest of this section explains each technique.

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 (host)
drive.

To enlarge the compressed drive:

1. Start the DriveSpace program by typing DRVSPACE at the command prompt.

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

   The Change Size dialog box appears. 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 New Free Space on the uncompressed
   drive. Notice that as you change this number, DriveSpace adjusts
   the New Free Space amount for the compressed drive. When the New Free
   Space amount for both drives is what you want, choose OK.

   DriveSpace enlarges the compressed drive.

Carrying Out the DRVSPACE /DEFRAG /F and DRVSPACE /DEFRAG Commands
on your Compressed Drive
------------------------------------------------------------------
You can sometimes free additional space on a compressed drive by
more fully defragmenting the drive. 

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 defragmenting the drive twice:

1. Make the compressed drive the current drive.

2. Type DEFRAG drive: /F at the command prompt

   Where drive: is the compressed drive. For example, DEFRAG C: /F.
   DEFRAG will fully defragment the drive's file allocation table,
   then start DRVSPACE /DEFRAG to consolidate the free space in
   the CVF.

3. When DEFRAG finishes, type DRVSPACE /DEFRAG /F at the command prompt.

   DriveSpace re-consolidates the free space on the drive so there
   is as much free space as possible.

7.7 Your uncompressed (host) drive runs out of disk space
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If your uncompressed (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 (host) drive:

1. Start the DriveSpace program by typing DRVSPACE 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. (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 DRVSPACE /LIST at the command prompt.)

   The Change Size dialog box appears. 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, DriveSpace adjusts
   the New Free Space amount for the compressed drive. When the New Free
   Space amount for both drives is what you want, choose OK.

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

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

1. To determine which drive is your uncompressed drive, type
   DRVSPACE /LIST at the command prompt.

2. Using Microsoft Backup, back up to floppy disks the files
   on the uncompressed drive that were not compressed.

3. Delete the files on the uncompressed drive that were not compressed.

4. Type DRVSPACE at the command prompt.

5. From the Drive menu, choose Change Size.

6. To increase the size of your compressed drive, decrease the size
   of your uncompressed drive, and choose OK.

7. From the Drive menu, choose Exit, and use Backup to restore
   the files you backed up to your compressed drive. If you run out of
   space again, repeat steps 5 through 7 until the compressed drive
   is large enough.

7.9 Windows displays the message "The permanent swap file is corrupt."
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If you use a Windows permanent swap file, it must be located on an
uncompressed drive. If your permanent swap file is on a compressed
drive, Windows displays the message "The permanent swap file is corrupt"
when it starts.

When you install DriveSpace, the DriveSpace Setup program checks for
the existence of a Windows permanent swap file. If it finds one,
DriveSpace Setup moves the swap file to your uncompressed drive.
However, if you install Windows after installing DriveSpace, or if you use
Control Panel to change the location of your permanent swap file, your
swap file might end up on a compressed drive. (When you specify a drive
for your permanent swap file, Windows allows you to choose a compressed
drive.)

To move your permanent swap file to an uncompressed drive:

1. Start Windows.

2. 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.

3. Open Control Panel, and then Drive-click the 386 Enhanced icon.

4. Choose the Virtual Memory button. Windows displays a dialog box stating
   that a corrupt swap file was found and asks if you want to set the
   file's length to zero.

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

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

7. 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 section 7.7.)

   When you have finished specifying swap-file settings, choose OK twice,
   and follow the instructions on your screen.

7.10  EXTDISK.SYS displays a warning about drive letters.
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If you are using DriveSpace on a Compaq computer, 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 because DRVSPACE.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 DRVSPACE.SYS device
driver is loaded in the CONFIG.SYS file.)

7.11 You need a special device driver to use your startup driv