Mail Archives: opendos/2002/03/07/18:13:45
If anything can fix this automatically, it's Norton Disk Doctor (NDD).
However, automated fix-ups often make incorrect assumptions and
do precisely the wrong thing, so you may prefer to fix this manually.
In Norton's NU (eg. V4.5) or DiskEdit (eg. V6), use the "Explore
Sectors" option. This should tell you what sectors your two FATs
occupy. Divide this range in two, to figure out the starting sector
for FAT #2. Then enter this range of sectors as your "selected item".
Now, you can choose to "write your selected item", in a variety of
modes. Use the "sector" mode, and enter the starting sector for
FAT #1. Viola! You have just written FAT #2 over FAT #1.
Joe.
> -----Original Message-----
> From: Dominic Winston [SMTP:dominic_winston AT angelfire DOT com]
> Sent: Thursday, March 07, 2002 5:26 PM
> To: opendos AT delorie DOT com
> Subject: 2nd FAT?
>
> Hi!
>
> I have a hard drive that crashed. It was formatted, with several logical
> partitions, under DR-DOS 5.0; and I had DR-DOS 5.0 and Windows 3.1
> installed on it. It crashed during a Windows 3.1 freeze-up. I managed to
> get into the crashed drive and found that, in each sector, the primary FAT
> of each logical drive was corrupted. But, according to Norton Utilities,
> the second copy of the FAT is still ok.
>
> So my question is... how can the (apparently) intact second copy of the
> FAT be copied over the corrupted first copy of the FAT? Would doing that
> bring my directories and files back? And, if so, is there a method to
> replace FAT number one with the FAT number two? Norton Utilities doesn't
> seem to be able to do this directly and I've searched for a command-line
> utility to do this but to no avail. Why does DOS have two FAT's if one FAT
> can't easily be used to restore the other??
>
> Any ideas?
>
> Nick
>
>
>
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