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Date:      Mon, 26 Sep 2005 20:19:03 -0400
From:      Kris Kennaway <kris@obsecurity.org>
To:        Jon Dama <jd@ugcs.caltech.edu>
Cc:        freebsd-current@freebsd.org, Kris Kennaway <kris@obsecurity.org>
Subject:   Re: [PANIC] ufs_dirbad: bad dir
Message-ID:  <20050927001903.GD72460@xor.obsecurity.org>
In-Reply-To: <Pine.LNX.4.53.0509261547190.26869@barf.ugcs.caltech.edu>
References:  <20050926152952.GA1670@dragon.NUXI.org> <20050926160808.GB1649@dragon.NUXI.org> <20050926180615.GA61075@xor.obsecurity.org> <Pine.LNX.4.53.0509261515310.26869@barf.ugcs.caltech.edu> <20050926224202.GA39901@xor.obsecurity.org> <Pine.LNX.4.53.0509261547190.26869@barf.ugcs.caltech.edu>

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On Mon, Sep 26, 2005 at 03:54:47PM -0700, Jon Dama wrote:
> Sure, but I've provoked this with marginal memory configurations.  The
> trouble is that if your memory configuration is marginal this symptom
> makes a good deal of sense.  i.e., you can model the problem as an usually
> high incidence of alpha particle collisions.
>=20
> Also such marginal configurations are likely to be temperature sensitive.
>=20
> ... of course taking this attitude might have the same bad effect as if
> when observation disagreed with the ptolemaic system,  Kepler and the
> rest had instead just said, "ah, there god goes again bumping the planets
> with his finger"  what a tragedy that would have been.

Again, there is no correlation between workload, frequency or which
machines experience the problems for me.  It just happens from time to
time.

Kris

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