linux-kernel - Re: sata_nv issues with MCP51 SATA controller

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Date:	Fri, 14 Sep 2007 14:10:21 +0200
From:	Jon Ivar Rykkelid <jonry@....org>
To:	Robert Hancock <hancockr@...w.ca>
Cc:	Jeff Garzik <jeff@...zik.org>, Tejun Heo <htejun@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: sata_nv issues with MCP51 SATA controller

Hi,

To eliminate the possibility of this being a hardware issue, I have now 
acquired another "Gigabyte GA-N650SLI-DS4" motherboard (with the "MCP51" 
chipset) for testing. I'll swap parts this evening. Hopefully I'll be 
able to tell you in a few hours whether this appears to be working as it 
should. The motherboard that I'm going to swap to has actually been 
tested (with MS Windows OS+driver) for more than a day with a disk 
connected, so if this MB also fails, I think it will be safe to say that 
the issue is with the sata_nv driver... So hang on.

(You can't think of something else that could conflict with the sata_nv 
driver after a bit of time, like two of my raid-disks being encrypted, 
me running a SW raid-5 array / some special HW (quad-core CPU) / me 
running vmware on this server ... ? - To me, all these suggestions seems 
rather far fetched, especially as all is working with another 
controller, so I'm arguing that unless there's a HW issue, the issue is 
with the driver, but you're the expert(s), so let me know if you differ.)

I'll keep you posted as to the result of swapping HW.. Give me a few 
hours.  :-)

BR
Jon Ivar

Robert Hancock wrote:
> Jeff Garzik wrote:
>> Jon Ivar Rykkelid wrote:
>>> Hi,
>>>
>>> I now tested with the adma=0 option, but if anything I got a crash 
>>> quicker than before. Same error message started coming in, but this 
>>> time the system hung before I was able to capture the log as well 
>>> (but I saw the error, and it was the same as before, except that 
>>> this time it was the ata3-channel that first started acting up..) - 
>>> To remind you all what this is about, I have reattached the log that 
>>> I originally captured...
>>
>> Sounds like a hardware problem, since disabling ADMA is generally the 
>> cure-all we use -- it appears to stress the hardware less.
>
> If this is an MCP51 chipset, adma=0 will make no difference since that 
> chipset does not support ADMA in the first place.
>
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