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Date:      Tue, 8 Oct 2019 17:12:25 +0000
From:      Glen Barber <gjb@freebsd.org>
To:        Mark Linimon <linimon@lonesome.com>
Cc:        Mike Karels <mike@karels.net>, freebsd-arm@freebsd.org
Subject:   Re: FreeBSD 12.1-BETA3 won't boot on Beaglebone Black
Message-ID:  <20191008171225.GW27491@FreeBSD.org>
In-Reply-To: <20191008170405.GA18428@lonesome.com>
References:  <20191007093947.69ae5d772ebedfc1e1c98328@bidouilliste.com> <201910080102.x98127Jk048407@mail.karels.net> <20191008153417.GQ27491@FreeBSD.org> <20191008170405.GA18428@lonesome.com>

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On Tue, Oct 08, 2019 at 05:04:06PM +0000, Mark Linimon wrote:
> On Tue, Oct 08, 2019 at 03:34:17PM +0000, Glen Barber wrote:
> > I have seen issues with some SD cards on a few different SoCs where
> > certain classes (i.e., 4) are too slow for some boards, and higher
> > classes (i.e., 10) are too fast for others.
>=20
> ew.  We should document this somewhere.  The potential for users
> shooting themselves in the feet is too high.
>=20

The "problem" with documenting this (or, at least me documenting it) is
I have seen very inconsistent behavior.  But if someone(tm) can reliably
reproduce test cases with various SD card classes, yes, I agree it is
something that would be highly beneficial to have documented.

Glen


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