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Date:      Tue, 19 Jan 2016 14:50:18 +0000
From:      Matthew Seaman <matthew@FreeBSD.org>
To:        freebsd-questions@freebsd.org
Subject:   Re: Panic with sym on 10.2
Message-ID:  <569E4D2A.2020301@FreeBSD.org>
In-Reply-To: <569E4ABB.9070903@netfence.it>
References:  <569E368F.4060802@netfence.it> <569E45D9.1050604@freebsd.org> <569E4ABB.9070903@netfence.it>

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On 2016/01/19 14:39, Andrea Venturoli wrote:
>> Is it possible your disk controller is succumbing to the vagaries of a=
ge?
>=20
> I have never seen any little trouble with such a card (I've had more
> than one here and at customers'); thought it might actually be dying, I=

> really find it strange that it started as soon as I upgraded from 9.3 t=
o
> 10.2...

Yeah.  I've seen hardware failures triggered by big system updates
before now.  It's not particularly common, but it is possible for the
amount of IO churn involved in updating to tip a marginal component over
the edge.  Generally you'll only see this sort of effect if the system
is otherwise pretty quiet during normal operation.

As to the failure mode -- sure these things usually die completely, but
they can die gradually and in subtle ways, usually when doing that is
the most inconvenient possible thing.

	Cheers,

	Matthew



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