Re: Problems with Transcend compact flash cards

["Avocet" madl74]

There is a problem with flash card design. The old larger memory gates
are not available with new high density silicon. Also instead of
storing binary, they now store in quaternary - 2 bits and four states.
Reliability suffers if there is not good error correction on the chip.

The other problem is that each gate cell is now down to a few hundred
atoms, which makes it more vulnerable to radiation like background
radioactivity and cosmic rays. Long term storage cannot be guaranteed
to be free of errors. The odd bit (or two) is not much of a problem
with a sound recording but with any associated data it can change
commands.
http://en.wikipedia.org/wiki/Cosmic_ray#Effect_on_electronics

Note: Don't fly with your best card recordings. :-)

David

David Brinicombe
North Devon, UK
Cogito cogito ergo cogito sum - Ambrose Bierce