linux-kernel - Re: amd64 sata_nv (massive) memory corruption

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Message-ID: <3ae3aa420808011951l58da4010r1ff0876f255565b0@mail.gmail.com>
Date:	Fri, 1 Aug 2008 21:51:53 -0500
From:	"Linas Vepstas" <linasvepstas@...il.com>
To:	"Alistair John Strachan" <alistair@...zero.co.uk>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: amd64 sata_nv (massive) memory corruption

2008/8/1 Alistair John Strachan <alistair@...zero.co.uk>:
> On Friday 01 August 2008 18:30:34 Linas Vepstas wrote:
>> Hi,
>>
>> I'm seeing strong, easily reproducible (and silent) corruption on a
>> sata-attached
>> disk drive on an amd64 board.  It might be the disk itself, but I
>> doubt it; googling
>> suggests that its somehow iommu-related but I cannot confirm this.
>
> Nowhere do you explicitly say you have memtest86'ed the RAM.

It passes memtest86+ just fine. The system has been in heavy
use doing big science calculations on big datasets (multi-gigabyte)
for months; these do not get corrupted when copied/moved around
on the old parallel IDE disk, nor moving/copying on an NFS mount
to a file server. Only the SATA disk is misbehaving.

--linas
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