Re: FAT-filesystem EOF marker problem

[Andries Brouwer <aebr@win.tue.nl>]

On Tue, Sep 24, 2002 at 12:34:22PM -0700, H. Peter Anvin wrote:

> > | My docs say: FAT entry 0 contains the media descriptor byte.
> > | FAT entry 1 contains the EOF marker, except that the high order two
> > | bits can be used for other purposes.
> > 
> > And the value that I see there is 0xfff.
> 
> Fat entry 0 contains the media descriptor byte, and fat entry 1 *used*
> to contain the EOC mark, but has been retconned as the volume dirty bit

Yes, I know.
(As I see it, it still holds the EOC mark, but only the low order bits
are of interest, so the top two bits have a different meaning now.)

Let me mention
	http://www.win.tue.nl/~aeb/linux/fs/fat/fat.html
(my notes on the FAT filesystem).

If anyone has corrections or additions I'd like to hear.

Andries


P.S. I checked some old stuff but did not find anything with a EOC
other than 0x*fff.  I would be interested in hearing about which
non-Linux programs used other values.