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- VERDISK is a quick way to check on the condition of disks, to
- give warning of impending failure.
-
- It uses the PC disk I/O call (INT 13) to verify the readability of
- each sector on the disk. All verify errors are reported, indicating the
- error type (drive seek, controller, CRC, missing sector, missing addr mark),
- the side, track and sector, and the number of unsuccessful retries, up
- to a maximum of 5. The batch ERRORLEVEL is also set as a return code.
-
- All PC and AT 5.25" floppy formats and IBM hard disks are
- supported. The IBM 8" floppy formats are not supported. If you have
- hard disks then DOS device B: must be BIOS unit 80H, C: must be 81H,
- and so on.
-
- Syntax: VERDISK d:
-
- Where d: is the drive specifier.
-
- The ERRORLEVEL is OR'ed with to indicate
- 1 recoverable disk error (successful retry)
- 2 non-recoverable error (unsuccessful after 5 retries)
- 4 non-supported disk type
- 8 invalid drive spec
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-