Le mercredi 12 Juillet 2006 14:46, John Hermanson a écrit :
> Would someone explain why formatting a cf or xd card with a computer
> would render it unrecognizable when put into the camera? A third party
> wants to know.
That's pure marketing consumer lock-in from Olympus (boooooooooh !!) ; the
formater must digitaly "sign" the card for the camera to recognize it, and
the camera use various flags located in (usualy) free spots of the medium for
various purposes (signal a panoramic picture). Olympus, in a gesture of
mercy, made the card pc readable (understand : the olympus format is FAT
compatible for reading purposes on a computer), but don't even dare thinking
of writing anything on it from a computer : you could destroy any "special
bits" at any time, and that would kill the card (the firmware would refuse to
recognize it as olympus original). It seems that sandisks readers may be
compatible though, because sandisk makes the xD for olympus and have a
license to make proper read / write devices. But check for claims of
compatibility.
On the other hand, this behaviour helps greatly in simplifying the firmware of
the camera which is only a tailor crafted subset of a true FAT compatible
software.
But the main purpose is to compel the user into buying olympus branded cards
only (booooooooooh again !!) ; it would be like using a 23 mm wide film in a
conventional camera : that would be mostly compatible with enlargers, but you
wouldn't be able to put "unauthorized" films in it.
--
Manuel Viet
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