Hi, Michael.
If you use the /r (or /f) switch, any corrections discovered will be written
to the HD. With no switch, chkdsk finds errors, but does not repair them.
If you are running this on the System Partition (typically Drive C

or the
Boot Volume, it will probably tell you that it will run the next time you
reboot; on any other volume it should run immediately.
At the C:\ prompt, type chkdsk /? to see all the switches available with
this command.
RC
--
R. C. White, CPA
San Marcos, TX
(E-Mail Removed)
Microsoft Windows MVP
"Michael" <(E-Mail Removed)> wrote in message
news:158501c37916$919a5d40$(E-Mail Removed)...
> I have a second drive installed on my system (W2K Pro)
> configured as two Logical Drives, with both formated as
> NTFS. The first of these logical dirves periodically (at
> least once every other day) reports error below:
>
> "The file system structure on the disk is corrupt and
> unusable. Please run chkdsk utility on volume x:."
>
> I have done this each time...I have also run the drive
> manufacturer's test utilities against the drive. It passes
> all of their tests.
>
> Can anyone point me another cause for this error...and a
> solution.
>
> Thanks,
> Michael