Microsoft KB Archive/103533

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DoubleSpace Err Msg Mounting CVF: There Is a Disk Error on...

Article ID: 103533

Article Last Modified on 11/22/1999


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

This article was previously published under Q103533

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 you copy a compressed volume file (CVF) to a DoubleSpace-compressed drive and attempt to mount the file, you receive the following messages:

DoubleSpace is mounting drive <letter>.
DoubleSpace cannot mount drive <letter>.
There is a disk error on drive <letter>. To fix it, type SCANDISK
<letter> at the command prompt.

For example, you receive this error if you copy DBLSPACE.001 to your compressed drive C and type dblspace /mount=1 c: at the MS-DOS command prompt. In addition, your drive C is unmounted.


DoubleSpace is not designed to support mounting CVFs from CVFs.


To work around this problem:

  1. Restart your computer to gain access to your compressed drive.
  2. Copy the CVF from your compressed drive to an uncompressed drive.
  3. Mount the CVF from the uncompressed drive.

Additional query words: 6.20

Keywords: KB103533