More RPI-B/SD card information

[Glen Barber]

On Thu, Jul 16, 2015 at 09:02:23AM -0700, Carl Johnson wrote:
> Glen Barber <gjb at FreeBSD.org> writes:
> 
> > On Wed, Jul 15, 2015 at 08:54:03AM -0700, Carl Johnson wrote:
> >> Glen Barber <gjb at FreeBSD.org> writes:
> >> 
> >> > On Tue, Jul 14, 2015 at 08:54:06PM -0700, Carl Johnson wrote:
> >> >> I bought a new microSDHC card and that card works.  The new one is a
> >> >> 16GB SanDisk Ultra PLUS UHS-1 card in case anybody is keeping track.  I
> >> >> had tried two different Class 4 cards that didn't work, so maybe the
> >> >> faster speed is necessary now, or maybe it is picky about brands.
> >> >> 
> >> > FWIW, I have a few class-10 cards that will absolutely not work, and
> >> > a few class-4 cards that work perfectly fine.
> >> 
> >> Thanks, that is useful to know.  The first class-4 card worked with a
> >> January 10.1-STABLE snapshot, but didn't work with June 10.1-STABLE or
> >> 11.0-CURRENT snapshots or the 10.2-BETA1 release.
> >> 
> >
> > I did a bit more testing, and it seems the RPI-B is *very* picky about
> > what SD cards will work.  Below follows results of the tests, using the
> > 20150716-r285616 RPI-B image (built last night, propagating now).
> 
> As I mentioned above, I have a card that will boot an old snapshot but
> refuses to boot on newer code.  I have verified that the card will still
> boot the old snapshot, so I know the card is still good.  That seems to
> indicate that something in the code has changed.  Unfortunately, I am
> not enough of a programmer to be able to trace through anything that
> complex.
> 

Right, but with my testing (specifically cards (7) and (8), which as far
as I can tell are the same card), one works and one does not.  This is
what I am trying to understand, because unless there is something wrong
with the card, it's not being detected as "bad" by the other boards
I have.

Glen

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