Microsoft KB Archive/104889

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DoubleSpace Doesn't Support Logical Drive B on Single Floppy

Article ID: 104889

Article Last Modified on 11/20/1999


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

This article was previously published under Q104889


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.

DoubleSpace does not work correctly if you mount two DoubleSpace- compressed floppy disks on drive letters A and B if you only have one physical floppy disk drive.


If you have one floppy disk drive (A) but can access it as A or B, you will encounter problems with DoubleSpace if you manually mount a DoubleSpace-compressed floppy disk on both drives A and B.

NOTE: The DoubleSpace Automount code disables itself for logical drive B if you have only one floppy disk drive.

To avoid this problem, do not use the logical drive B to manually mount a DoubleSpace-compressed floppy disk.

Additional query words: 6.20 phantom auto-mount for insert diskette

Keywords: KB104889