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Date:      Fri, 5 Dec 2014 13:55:58 -0700
From:      Warner Losh <imp@bsdimp.com>
To:        John-Mark Gurney <jmg@funkthat.com>
Cc:        freebsd-arm@freebsd.org
Subject:   Re: single user mode?
Message-ID:  <64ED447D-BCC8-48DC-A92A-5C0839B36029@bsdimp.com>
In-Reply-To: <20141205204719.GD25139@funkthat.com>
References:  <201412051306.sB5D6otZ007591@mech-as221.men.bris.ac.uk> <20141205204719.GD25139@funkthat.com>

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> On Dec 5, 2014, at 1:47 PM, John-Mark Gurney <jmg@funkthat.com> wrote:
>=20
> Anton Shterenlikht wrote this message on Fri, Dec 05, 2014 at 05:06 =
-0800:
>> Is it possible to enter a single user mode
>> on arm 10.1-release?
>=20
> If you're using loader, yes it is possible, but often loader is not
> used on arm...
>=20
>> My disk, well.. the sd card, got corrupted,
>> so wanted to run fsck on it, but cannot
>> enter a single user mode. I ended up putting
>> the sd card into a laptop and running fsck there.
>> This fixed lots of panics, but is it possible
>> to enter the single user mode on arm, and
>> run fsck directly there?
>=20
> You do know of:
> fsck_y_enable=3D"NO"      # Set to YES to do fsck -y if the initial =
preen fails.
>=20
> which might help=E2=80=A6

There=E2=80=99s a semi-known, semi-reproducible issue with arm (but =
maybe not armv6)
where ANY errors that require an FSCK will land you in this situation. =
It hasn=E2=80=99t
been tracked down yet. There seems to be three or four variations that =
Ian and I
have run into. The trouble is tracking this down is a big investment in =
time,
potentially, and there=E2=80=99s been lots of bigger fish to fry :(

Warner


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