KB148479 - Cannot Restore DoubleSpace-Compressed Backup with MS-DOS 6.22

Article ID: 148479

Article Last Modified on 8/9/2004

Microsoft MS-DOS 6.22 Standard Edition

This article was previously published under Q148479

SYMPTOMS

If you back up files with compression using Msbackup.exe or Mwbackup.exe using MS-DOS 6.0 or 6.2 and you then install MS-DOS 6.22, you may not be able to restore your compressed backup.

CAUSE

In order to restore the backup, the MS-DOS 6.0 or 6.2 Dblspace.bin file and the Drvspace.mr1 file must be available on your hard disk.

NOTE: When you upgrade MS-DOS 6.0 or 6.2 to MS-DOS 6.22, the Dblspace.bin file should be left on the hard disk. However, if you install MS-DOS 6.22 to a clean hard disk, the version of Dblspace.bin from MS-DOS 6.0 or 6.2 is not available. The Drvspace.mr1 file is included with the DoubleSpace Conversion Kit. For additional information, please see the following article in the Microsoft Knowledge Base:

117806 DoubleSpace Conversion Kit: Description & How to Obtain

RESOLUTION

To resolve this problem, Microsoft has made the Dblspace.bin file from MS-DOS 6.2 available for download.

To restore your compressed backup, follow these steps:

Install the DoubleSpace Conversion Kit (Dblconv.exe).
Download the DBL622.EXE file from the Microsoft Download Center to an empty folder.
Run the DBL622.EXE file you downloaded in step 2 by typing dbl622 at the MS-DOS prompt.
Copy the Dblspace.bin file to the MS-DOS folder.

The following file is available for download from the Microsoft Download Center:

[GRAPHIC: Download] Download Dbl622.exe now

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to Obtain Microsoft Support Files from Online Services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.

MORE INFORMATION

The following file is created when you run Dbl622.exe:

   File name      Size     Date       Version
   ------------------------------------------
   Dblspace.bin   64,246   09/30/93   6.20

Additional query words: 6.22 drvspace drvspace.exe

Keywords: kbdownload kbgraphxlinkcritical kbfile kbprb KB148479