Article ID: 110712
Article Last Modified on 11/18/1999
APPLIES TO
- Microsoft MS-DOS 6.2 Standard Edition
- Microsoft MS-DOS 6.22 Standard Edition
This article was previously published under Q110712
SUMMARY
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.
SYMPTOMS
You receive the following error message when you run ScanDisk on a hard card:
This error can occur immediately after you attempt to compress a hard card with DoubleSpace. In this scenario, the compressed drive doesn't mount after DoubleSpace reboots your system. When you try to manually mount the compressed volume file (CVF), you receive an error message stating that DBLSPACE.000 is not a valid CVF, and that you should run ScanDisk.
CAUSE
This problem can occur when you run ScanDisk on a hard card and the hard card device driver is not loaded in memory. You can read data from many hard cards, even when the device driver is not loaded; however, you cannot write data to the hard cards.
NOTE: Under these circumstances, problems similar to those noted above also occur if you run a third-party surface-scan program.
RESOLUTION
To correct this problem, load the hard card drivers prior to running ScanDisk.
If you have a DoubleSpace-compressed drive, the hard card drivers are probably stored within the unmounted CVF. You can correct this problem by copying the hard card device drivers from the hard card installation disks. For more information, query on the following words in the Microsoft Knowledge Base:
hard card and startup and compressed and dblspace
Additional query words: 6.20 disk read write F5 clean boot hardcard double space
Keywords: KB110712
