Date: Tue, 14 Sep 1999 10:31:24 +0200 (IST)
From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
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To: Martin Str|mberg <ams AT ludd DOT luth DOT se>
cc: DJGPP-WORKERS <djgpp-workers AT delorie DOT com>
Subject: Re: FAT32 detection
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On Sun, 12 Sep 1999, Martin Str|mberg wrote:

> I forgor to check on my version of DOZE 6.22. Here's a new version of the
> program. Feedback from earlier versions of DOZE would be valuable.

On Windows 95: FAT16 hard disk and floppy disk both work (the latter
reports FAT12, as expected).  CDROM and a networked drive both fail
(getfatsz returns -1).

On NT 4.0sp3: A: returns FAT12, but H: (a networked disk mounted via NFS) 
returns FAT16.  I guess you need to check for the drive type explicitly.
Also, C:, an NTFS partition, returns FAT16.  What do we want an NTFS 
partition to return?

I will try on DOS 5.0 tonight and let you know.

Allow me a comment on the code:

      if( number_of_clusters < 4085 )
      {
	size = 12;
      }
      else if( number_of_clusters < 65525 )
      {
	size = 16;
      }
      else
      {
	size = 32;
      }

Is the above logic safe?  For example, are all FAT12 floppies less
than 4K clusters?  What about the Microsoft 2MB format?  Also, can't
there be a FAT32 volume with less than 64K clusters?