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Date:      Sat, 10 Feb 2001 20:05:58 -0800
From:      "Alec Wolman" <wolman@cs.washington.edu>
To:        "Matthew Emmerton" <matt@gsicomp.on.ca>
Cc:        stable@FreeBSD.ORG, "Eric Jacoboni" <jaco@teaser.fr>
Subject:   Re: ata driver and HighPoint HPT370 ATA100 controller 
Message-ID:  <200102110405.UAA90354@miles.cs.washington.edu>
In-Reply-To: Message from "Matthew Emmerton" <matt@gsicomp.on.ca>  of "Sat, 10 Feb 2001 21:11:39 EST." <002501c093cf$fa1a8810$1200a8c0@gsicomp.on.ca> 

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> > I've got my new machine with a Abit KT7A-RAID motherboard. All runs ok
> > except something i dont understand with the ata driver.
> >
> > My box is all IDE : IBM DTLA hard drive as primary master, CDROM as
> > secondary master and CD-RW Plextor 12/10/32A as primary master on the
> > second IDE controller (HighPoint HPT370 ATA100).
> >
> > At boot, i get the following messages :
> >
> > ad0: 43979MB <IBM-DTLA-307045> [89355/16/63] at ata0-master tagged UDMA66
> > acd0: CDROM <ATAPI 50X CDROM> at ata1-master using UDMA33
> > acd1: CD-RW <PLEXTOR CD-R PX-W1210A> at ata2-master using PIO4
> >
> > Why the Plextor is not recognized as UDMA ?
> 
> Even though your controller supports UDMA operation, not all devices use it.
> A quick scan of the manual for your Plextor seems to indicate that it only
> operates in PIO4 mode, and not UDMA33/66/100..

My plextor drive (same model) supports DMA.  It is hooked up
to a VIA 82C686 controller.  Here is the message from my boot probe...

acd0: DVD-ROM <TOSHIBA DVD-ROM SD-M1402> at ata1-master using UDMA33
acd1: CD-RW <PLEXTOR CD-R PX-W1210A> at ata1-slave using WDMA2


Alec


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