linux-kernel - Re: JMicron PATA 2.6.24-rc7 can't find drives

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Date:	Thu, 24 Jan 2008 12:22:26 -0500
From:	lsorense@...lub.uwaterloo.ca (Lennart Sorensen)
To:	Krzysztof Halasa <khc@...waw.pl>
Cc:	Marcin Gil <marcin.gil@...il.com>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: JMicron PATA 2.6.24-rc7 can't find drives

On Thu, Jan 24, 2008 at 06:11:22PM +0100, Krzysztof Halasa wrote:
> Marcin Gil <marcin.gil@...il.com> writes:
> 
> > +-----+-----+
> > mobo  hdd   dvd
> >
> > I think that cable select would take dvd as master and hdd as slave.
> > This was not preferable when hdd was my primary drive. I can try
> > cable-select now since I boot off new SATA drive.
> 
> Is a master in the middle permitted by the specs at all?

On 40 pin cable select it was in fact required.  On 80pin the end is the
master and the middle the slave which I believe is supposed to give
better signal quality when only one device is in use.

--
Len Sorensen
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