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Date:      Sun, 14 Jan 2007 17:37:02 +0100
From:      =?ISO-8859-1?Q?S=F8ren_Schmidt?= <sos@deepcore.dk>
To:        =?ISO-8859-1?Q?Peter_Ankerst=E5l?= <peter@pean.org>
Cc:        freebsd-stable@FreeBSD.ORG, Pietro Cerutti <pietro.cerutti@gmail.com>, sos@FreeBSD.ORG
Subject:   Re: 6.2 RELEASE - READ_DMA timed out
Message-ID:  <45AA5C2E.5030901@deepcore.dk>
In-Reply-To: <45AA41F8.60107@pean.org>
References:  <45AA3109.2040309@pean.org> <e572718c0701140627s3c46da20y6f02c097e2c1e60a@mail.gmail.com> <45AA41F8.60107@pean.org>

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Peter Ankerstål wrote:
> Pietro Cerutti wrote:
>> On 1/14/07, Peter Ankerstål <peter@pean.org> wrote:
>>>
>>> ad0: FAILURE - READ_DMA timed out LBA=1000941
>>>
>>
>> This kind of errors usually denote a hardware problem, either at the
>> disk or at the controller level.
>> Check sysutils/smartmontools in the ports.
>>
> But there was no problem at all before the upgrade, and it works 
> without any problem in "safe mode"
> and I have done fscks on the CF-card without any errors.
The reason it works in safe mode is that DMA is not used there. Are you 
sure it worked with DMA before ?

DMA access on CF cards needs signal lines to the CF slot thats not 
always implemented, fx on older soekris boards.

-Søren




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