Yo Achim! On Mon, 08 Jan 2018 21:47:05 +0100 Achim Gratz via devel <devel@ntpsec.org> wrote:
> You might have better luck with somewhat less cheap cards, one of the
> big differences between SD cards is how well they do wear levelling.
Yup. I see that, can't say it corelates so much to price as brand.
> Also, a bigger card with free space has more actual storage to level
> the wear on.
Yeah, I'm all 32GB for RasPi now. I'll do 64GB when the price
comes down a tad more.
> Actually I think that the failed card might start working again when
> I just low-level format it
I've not been so lucky. Better to give the card to 'friends'. :-)
> I might contemplate a mini USB drive for the logs, but I'd like to
> keep things local.
I've never beat on a USB drive as much as I beat on an SD card. Would
they really be better? At least if the data is on its own device I
only lose the data.
> Unfortunately there is no way of knowing in
> advance how much current those frives pull
Easy, get a USB VA meter. Good ones for $8. You'll be amazed at all
the things it teachs you.
I also have 1 Amp, 2 Amp, USB loads. A lot of USB cables will not carry
much current.
> and I'd like to keep that
> as low as possible also.
I just tested a 16GB USB stick. 0.06A idle. 0.10A continuous reading.
0.10A continuous writing.
Then a 32GB SD card, in a USB adapter. 0.03A idle, 0.08 continuous
reading, and 0.09A continuous writing. So not much difference.
RGDS
GARY
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