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Date:      Tue, 17 Oct 2006 17:58:36 -0500
From:      Brooks Davis <brooks@one-eyed-alien.net>
To:        Norberto Meijome <freebsd@meijome.net>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: kernel panic mounting /tmp - 6.2-PRERELEASE
Message-ID:  <20061017225836.GB73392@lor.one-eyed-alien.net>
In-Reply-To: <20061018084439.6451312c@localhost>
References:  <20061018002558.3a2bcdf6@localhost> <20061017145946.GB68977@lor.one-eyed-alien.net> <20061018071155.4331765a@localhost> <20061017223350.GA73392@lor.one-eyed-alien.net> <20061018084439.6451312c@localhost>

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On Wed, Oct 18, 2006 at 08:44:39AM +1000, Norberto Meijome wrote:
> On Tue, 17 Oct 2006 17:33:50 -0500
> Brooks Davis <brooks@one-eyed-alien.net> wrote:
>=20
> > > Gotcha - i thought as much... i hoped a dump -0 would save enough info
> > > though. I just needed to have /tmp back in place asap....
> > >=20
> > > i'll keep the files around for a week or so in case something comes u=
p. =20
> >=20
> > Good thought, but anything short of "dd if=3D/dev/<tmpdevices>
> > of=3D/path/to/some/location" probably won't preserve the corrupt bits.
> > Think of dump as a version of tar that also knows how to read file
> > systems directly.  It only preserves files and their contents not the
> > actual file system bits on the disk
>=20
> Yes, I realise that now, it was late and I wasn't thinking too straight
> obviously.
>
> BTW, the mount in 6.1-RELEASE CD had no issue at all mounting the filesys=
tem..
> dump I used was 6.1-RELEASE too . would have  been user land app related,=
 or
> actual UFS kernel code that made the difference?=20

That's somewhat distrubing.  That sounds like a change to the UFS code
somehow made things more fragile, though it could be an access pattern
issue of some sort.

-- Brooks

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