Article ID: 111908
Article Last Modified on 11/21/1999
APPLIES TO
- Microsoft MS-DOS 6.2 Standard Edition
This article was previously published under Q111908
SYMPTOMS
ScanDisk repairs an error in the Microsoft DoubleSpace BIOS Parameter Block (MDBPB), or does not find any errors, when examining a compressed volume file (CVF); however, DoubleSpace is unable to mount the CVF and displays the following error
where <x> is the drive letter of the CVF when mounted, <y> is the host drive, and <nnn> is the CVF's sequence number (extension). You do not have access to the files on the compressed drive.
STATUS
There may be rare instances of CVF corruption that ScanDisk cannot correct. Microsoft is researching this problem and will post new information in the Microsoft Knowledge Base as it becomes available.
CAUSE
WORKAROUND
If you are using MS-DOS 6.2, and your CVF was not created with a beta version of MS-DOS 6.0, contact Microsoft Product Support Services for assistance in resolving this problem. NOTE: If your CVF was created with a beta version of MS-DOS 6.0, you need to remove the DoubleSpace CVFs, and then install an MS-DOS 6.x Upgrade. You will not be able to backup the data on the damaged CVF in this case. IMPORTANT: If you have the above symptoms and are running MS-DOS 6.0, upgrade to MS-DOS 6.2 and use ScanDisk to repair the CVF. ScanDisk can correct most instances of CVF corruption that prevent DoubleSpace from mounting the volume.
MORE INFORMATION
To access the files on a compressed drive or CVF, DoubleSpace must mount the CVF. While ScanDisk can correct most problems that prevent DoubleSpace from mounting a CVF, there may be rare cases of CVF corruption that ScanDisk cannot repair.
REFERENCES
"Microsoft MS-DOS 6 Programmer's Reference"
Additional query words: 6.22 6.20 tshoot invalid damaged
Keywords: KB111908