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Date:      Thu, 13 Apr 2000 10:11:50 +1000 (EST)
From:      Warren Toomey <wkt@cs.adfa.edu.au>
To:        tsikora@powerusersbbs.com
Cc:        wkt@cs.adfa.edu.au, freebsd-stable@FreeBSD.ORG
Subject:   Re: New Motherboard and ATA Questions
Message-ID:  <200004130011.KAA06817@henry.cs.adfa.edu.au>
In-Reply-To: <38F50F8E.B943BC84@home.com> from Ted Sikora at "Apr 12, 2000  8: 6:38 pm"

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In article by Ted Sikora:
> Warren Toomey wrote:
> > 
> > In article by Stephen Montgomery-Smith:
> > > I was thinking about buying myself an EPOX EP-7KXA motherboard
> > > with the VIA Apollo KX133 chipset.  But I read that VIA Apollo
> > > chipsets have some problems with FreeBSD 4.0.
> > >
> > > Does anyone have any experience with this particular chipset?
> > 
> > Yep, you definitely need /sbin/sysctl -w hw.atamodes=pio,pio,pio,pio.
> > Put this right at the top of /etc/rc, and also in /.profile for
> > when you boot in single-user mode.
> >
>  
> This is for UDMA66 right?
>  
> Just uncommenting:
> options 	ATA_STATIC_ID		#Static device numbering
> options 	ATA_ENABLE_ATAPI_DMA	#Enable DMA on ATAPI devices
> 
> for a kernel puts UDMA33 on for me.

The patch I described fixes a specific problem with DMA use on the
VIA Apollo IDE chipset, i.e atapci0: <VIA 82C596B ATA66 controller>.
The workaround until you apply the patch is to disable DMA and use PIO.

I wasn't talking about UDMA33 or UDMA66.

Apologies for any confusion.

	Warren


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