On 2016-02-21 20:20 , Mark C wrote:
So it is... I questioned this specification because I wonder if all cards
aren't waterproof, shock and xray proof.
I have occasionally left cards in my pocket and sent them through the
washing machine, never with a problem. I always have made sure they dried
out for a while before trying them - but sometime they go through the dryer
as well. What does shock proof mean? No damaged when dropped? I'd expect
that from any solid state device. Xray proof? What does that mean? My phone
is xray proof, so are my socks.I don't understand why that is even a listed
spec...
it is just catering to consumer fears, the way marketers have always done; i
have washed a few *really cheap* cards and nothing was harmed; perhaps if i
were to leave them in the ocean for a few years, "non-certified" cards would
fail sooner than SanDisk's special models
the shockproof thing is funny because SD cards have such a high
surface-area-to-weight ratio that they are like insects, they can fall a
mile and not really get up to damaging speeds; there are other sources of
shock, such as hammer blows and explosions, so i think it would be smarter
for the marketers to use the hedge term ("shock resistant")
the X-ray thing is to tap into latent paranoia about airport scanners
hurting film; according to the most interesting blurb i could quickly find
"x-rays need a huge amount of energy to cause bulk damage on silicon" (and
X-rays with huge energy are very rare in the terrestrial world
<http://www.erai.com/presentations/Training%20Track%206/Radiation%20Damage%20on%20Electronic%20Components-Creative%20Electron.pdf>
For me - write speed is pretty much everything.
thanks for your (preceding) explanation on how it affects your field macros
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