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Microsoft KB Archive/104990

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Knowledge Base

Problems Using DoubleSpace on Disk Manager Partitioned Drive

Article ID: 104990

Article Last Modified on 11/21/1999


  • Microsoft MS-DOS 6.2 Standard Edition
  • Microsoft MS-DOS 6.22 Standard Edition

This article was previously published under Q104990


This information applies to both Microsoft DoubleSpace and Microsoft DriveSpace. For MS-DOS 6.22, use DRVSPACE in place of DBLSPACE for commands and filenames.

If the DMDRVR.BIN command is loaded after SMARTDRV /DOUBLE_BUFFER in your CONFIG.SYS file and your hard disk drive has more than 1024 cylinders, it may appear that your compressed data is lost after you create a new DoubleSpace-compressed drive.

This problem occurs when you have other DoubleSpace-compressed drives and you try to create a new DoubleSpace-compressed drive using the Disk Manager partitioned drive as the host.


This problem occurs when DMDRVR.BIN is loaded after SMARTDRV DOUBLE_BUFFER in the CONFIG.SYS file. DMDRVR.BIN should be the first device loaded in the CONFIG.SYS file.


To work around this problem:

  1. Restart your computer and press CTRL+F5 when the "Starting MS-DOS..." message is displayed.
  2. Delete the C:\DBLSPACE.BIN and C:\DBLSPACE.INI files.

NOTE: You may have to remove the file attributes first.

  1. Restart your computer.
  2. Edit your CONFIG.SYS file with a text editor such as MS-DOS Editor.
  3. Move the DMDRVR.BIN command to the top of your CONFIG.SYS file.
  4. Save the CONFIG.SYS file and exit the text editor.
  5. Restart your computer.
  6. Run DoubleSpace and create the new DoubleSpace-compressed drive again.

Additional query words: 6.20

Keywords: KB104990