rasPi Stretch Lite install notes

[Gary E. Miller]

Yo Achim!

On Mon, 08 Jan 2018 21:47:05 +0100
Achim Gratz via devel <devel at 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
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588

	    Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin
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