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Cc: freebsd-stable@FreeBSD.ORG, Pietro Cerutti <pietro.cerutti@gmail.com>,
	sos@FreeBSD.ORG
Subject: Re: 6.2 RELEASE - READ_DMA timed out
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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