From owner-freebsd-stable  Thu Jan 24 11:54:42 2002
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From: Søren Schmidt <sos@freebsd.dk>
Message-Id: <200201241954.g0OJsTq94418@freebsd.dk>
Subject: Re: ATA driver feature request
In-Reply-To: <20020124224757.O60455-100000@woozle.rinet.ru>
To: Dmitry Morozovsky <marck@rinet.ru>
Date: Thu, 24 Jan 2002 20:54:28 +0100 (CET)
Cc: scotty@klement.dstorm.net, Dmitry Valdov <dv@dv.ru>,
	Bill Moran <wmoran@potentialtech.com>, stable@FreeBSD.ORG,
	sos@FreeBSD.ORG
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It seems Dmitry Morozovsky wrote:
> > ad0: 19458MB <ST320420A> [39535/16/63] at ata0-master UDMA66
> > ad1: 76319MB <WDC WD800BB-40BSA0> [155061/16/63] at ata0-slave UDMA66
> > ata1-master: DMA limited to UDMA33, non-ATA66 compliant cable
> > ad2: 76319MB <WDC WD800BB-40BSA0> [155061/16/63] at ata1-master UDMA33
> > ad3: 2503MB <FUJITSU MPA3026ATU> [5086/16/63] at ata1-slave UDMA33
> >
> > They are the exact same drives using the exact same cable.  My controller
> > only supports UDMA66, not 100...   but the reason that the 2nd controller
> > seems to print out "non-ATA66 compiant cable" appears to simply be that
> > ad3 is only ATA33 capable.
> >
> > Just thought I'd pipe up, since the subject came up :)
> 
> Hmm, can ever ATA controller clock out both master device at 66MHz and
> slave at 33MHz? I suppose the effect is *not* unexpected.

Yes, the way I've done the mode programming it is possible to have the
two device run at different speeds (our competition cant do that).

> However, the warning message would be slightly reworded like "non-ATA66
> compliant cable or second device"

Good point, I'll get something done about this...

-Søren

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