The procedure for uncompressing a drive differs depending on which version
of MS-DOS you are using. If you are using MS-DOS 6.2, run the DoubleSpace
maintenance program and choose Uncompress from the Tools menu. If you are
using MS-DOS 6.22, run the DriveSpace maintenance program and choose
Uncompress from the Tools menu. If you are using MS-DOS 6.0 or you are
having difficulty with MS-DOS 6.2 DoubleSpace uncompressing a drive, follow
the procedure outlined in this article.
The following procedure describes how to remove DoubleSpace from your hard
disk while preserving your files. It is a lengthy procedure and should be
followed only if DoubleSpace removal is necessary. If you need to change
the size of your DoubleSpace volume, type help dblspace at the MS-DOS command prompt and refer to the Help topic
If you want to remove DoubleSpace (and all data stored on the compressed
drive) but you do not need to preserve your files, DoubleSpace provides a
way to delete a compressed drive without manual intervention. You can
delete a compressed volume file (CVF) using the DoubleSpace maintenance
program interface or the command-line interface. To delete DoubleSpace
using the DoubleSpace maintenance program, choose Delete from the Drive
This example assumes that you have compressed your boot drive (C) and that
your DoubleSpace host partition is H. For more information on how
DoubleSpace assigns host partitions, query on the following words in the
Microsoft Knowledge Base:
doublespace and assigns and host
The example also exclusively refers to MS-DOS 6.2 and DoubleSpace. If you
are using MS-DOS 6.22, substitute DRVSPACE for DBLSPACE commands,
DRVSPACE.* for DBLSPACE.*, and DRVSPACE.SYS for DBLSPACE.SYS.
If you are not removing DoubleSpace from your boot drive, skip
- Back up all the files you want to preserve from your compressed
drive (C) by using Microsoft Backup or a third-party backup utility.
(For information on using Microsoft Backup, see Chapter 3, "Managing
Your System," in the "Microsoft MS-DOS User's Guide.")
- When you remove DoubleSpace, what is now drive H will become drive
C, which means you will boot from drive H. To be able to boot from
drive H and restore your backup files, the DoubleSpace host partition
must contain the necessary MS-DOS system files and utilities.
Furthermore, if you stored your backup files on a network drive,
network redirectors must be available.
Determine how much free space you will need to copy the MS-DOS
files (and network redirectors) on the DoubleSpace host partition
(drive H). To do so, use the DIR command. For example, to see how
much space is needed for your MS-DOS files, type the following
The output appears as follows:
The next-to-last line shows the number of bytes used by the files in
the DOS directory. This number is the amount of free disk space needed
to store the necessary files and utilities after DoubleSpace is
194 file(s) 7003143 bytes
12959744 bytes free
- To free unused disk space from the DoubleSpace compressed volume,
use the /SIZE switch as follows:
- Determine how much free space there is on the DoubleSpace host
partition. To do this, change to drive H and use the DIR /A command.
The last line of the output from the DIR command shows the number of
bytes free on drive H. If this number is greater than the number you
found in step 2, there is enough space to copy the necessary files and
utilities, and you can proceed with step 6. If there is not enough
space on the DoubleSpace host partition, proceed to step 5.
- Delete enough files on drive C to create the needed space you
determined during step 2. (Note: Do not delete any MS-DOS or network
files; those files must be present during this procedure.)
You can use the DELTREE command to do this. (DELTREE quickly deletes
entire directories.) For example, to remove the WORD directory and all
the files and subdirectories it contains, type the following:
deltree /y c:\word
After you delete some files, shrink the DoubleSpace volume file
again by typing the following:
To find out if you've created enough free disk space, change to drive
H and use the DIR command. Again, the bytes in use and bytes free are
displayed. If the last line, "bytes free," shows enough free disk
space, continue with step 6. Otherwise, repeat step 5.
- Copy all the MS-DOS and network files that you need (the files you
determined were necessary during step 2) to the DoubleSpace host
partition (drive H). To preserve the file and directory structure, you
can use the XCOPY command with the /S switch. For example, to copy all
the MS-DOS files into a DOS directory on H, type the following:
xcopy c:\dos\*.* h:\dos /s
- Make sure there is a copy of COMMAND.COM in the root of the
DoubleSpace host partition by typing the following:
If COMMAND.COM is not present, copy it from the boot drive (C) with
the following command:
copy c:\command.com h:\
Repeat this step for AUTOEXEC.BAT and CONFIG.SYS files. These files
need to be in the root of the DoubleSpace host partition as well.
You now have all the files you need to boot from the uncompressed
drive and restore your backup files; you can begin removing the
- Switch to the root of the DoubleSpace host partition by typing the
- Delete the DoubleSpace files by using the following command:
- If you are removing DoubleSpace from your boot drive, open the
CONFIG.SYS file from the DoubleSpace host partition (H) in a text
editor, such as MS-DOS Editor. If you are not removing DoubleSpace
from your boot drive, open the CONFIG.SYS file from drive C. Remove
any reference to DBLSPACE.SYS. For example, change your DBLSPACE.SYS
DEVICE command to appear as follows:
- Restart your computer by pressing CTRL+ALT+DEL.
- Restore your backup files.
DoubleSpace has now been removed from your system.
Article ID: 96250 - Last Review: January 11, 2015 - Revision: 2.0
- Microsoft MS-DOS 6.0 Standard Edition
- Microsoft MS-DOS 6.2 Standard Edition
- Microsoft MS-DOS 6.22 Standard Edition
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