Knowledge Base

Running SCANDISK /ALL While a Virtual Drive Exists

Article ID: 108496

Article Last Modified on 11/25/1999

APPLIES TO

This article was previously published under Q108496

SYMPTOMS

Running SCANDISK /ALL incorrectly scans virtual drives created using the SUBST command.

STATUS

Microsoft has confirmed this to be a problem in the ScanDisk program included with MS-DOS versions 6.2, 6.21, and 6.22. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

If you use drive A as a virtual drive (for example, by using the command SUBST A: C:\DOS), running SCANDISK A: results in the following error message
Drive A was created by using the SUBST or ASSIGN command and cannot be checked. To check drive A, run ScanDisk on drive C instead.
The error message recommends running ScanDisk on drive C because the physical directory actually resides on C. This is normal.

If you run SCANDISK /ALL, ScanDisk actually diagnoses the virtual drive. While this should not cause errors, Microsoft recommends that you not run SCANDISK /ALL while a virtual drive exists.

Additional query words: 6.20 SCANDISK ALL SUBST

Keywords: KB108496


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