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From: elund@pro-graphics.cts.com (Eric Lund)
Newsgroups: comp.sys.ibm.pc
Subject: Re: Non-DOS drive error?
Message-ID: <3111@crash.cts.com>
Date: 11 Jun 90 09:56:16 GMT
Sender: news@crash.cts.com
Lines: 19
X-Local-Date: 11 Jun 90 02:56:16 PDT

>> My zenith PC has just developed an odd symptom.  During some disk operations,
>> we had a power flicker -- when the system was powered back, everything seemed
>> to be fine until I tried to run pctool to undelete a file.  "Error in FAT".
>> I ran chkdsk, which responded with "Probable non-DOS disk.  Continue?".
<<<<cut>>>>
> Are you sure that NDD actually corrected the FAT? I had the same problem with
> the "Probable non-DOS disk. Continue?" message and NDD corrected it.

This seems to be a popular problem.  What has happened is something has
altered your FAT improperly.  The media descriptor byte, which should be F8
hex for hard disks, has been changed to something else.  Grab a FAT editor,
such as the one in Norton Utilities, and change the FIRST byte of the FAT to
hex F8.  That should do it.

Eric W. Lund                             ARPA/DDN: pro-graphics!elund@nosc.mil
                                          Internet: elund@pro-graphics.cts.com
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