In message , Rick Dipper
writes
On Mon, 10 May 2004 08:57:05 +0100, "David W.E. Roberts"
wrote:
** A while since I looked at this, but doesn't a directory/folder hold the
details of the file name, attributes, and a pointer to the linked list (or
chain or similar) of individual blocks which makes up the body of the file?
AFAICS the camera is using FAT as the format to store data to aid
compatability with PCs when copying pictures. Granted there may be hidden
files which hold 'non-FAT' fast access data, or possibly another partition
on the disc for the camera-specific data, however the FAT partition seems to
be well thrashed. Difficult to draw a comparison with a real disc as there
are no moving parts and therefore there must be something there which
provides a virtual mapping from direct memory address to to head and
cylinder. Quite possibly this is damaged. **

In the good old days, you had cylinders heads sectors etc, and you
cound precisely control where data ended up on the disk. Nowdays a
disk is just hugle long streem of sectors, and the disk controller
fales up the cylinders/heads sectors counts. You can alter these
figures to a very large degree, and the things still work.

Meanwhile, back to memory cards ...
--
geoff