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Date:      Mon, 25 Jul 2011 15:12:55 +0200
From:      Andrea Venturoli <ml@netfence.it>
To:        freebsd-questions@freebsd.org
Subject:   Re: ATA troubles
Message-ID:  <4E2D6BD7.4030500@netfence.it>
In-Reply-To: <4e2d77ab.MMEk62U6kU%2BdlZeX%perryh@pluto.rain.com>
References:  <4E2CB198.9010601@netfence.it> <4E2CBCAB.1070209@dichotomia.fr> <4e2d77ab.MMEk62U6kU%2BdlZeX%perryh@pluto.rain.com>

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On 07/25/11 16:03, perryh@pluto.rain.com wrote:

> I fixed a similar problem -- involving a VIA 6421 controller --
> a while back, by using atacontrol(8) to reduce the DMA speed
> from UDMA133 to UDMA100.  Evidently it is possible, under some
> circumstances, for a device and controller to negotiate a speed
> that's too high to actually work :(

I checked and it was already set at UDMA100; I tried UDMA66, but nothing 
changed.
I don't know if this is really effective with SATA...

  bye & Thanks
	av.



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