More RPI-B/SD card information

[Carl Johnson]

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.

-- 
Carl Johnson		carlj at peak.org