Date: Sun, 31 Mar 2002 10:08:10 +1000 (est) From: Andrew MacIntyre <andymac@bullseye.apana.org.au> To: Willie Viljoen <will@laserfence.net> Cc: <freebsd-hardware@FreeBSD.ORG> Subject: Re: Instability with offboard IDE controller, CMD-649 Message-ID: <Pine.OS2.4.32.0203310956270.59-100000@tenring.andymac.org> In-Reply-To: <20020329221758.U508-100000@phoenix.vh.laserfence.net>
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On Fri, 29 Mar 2002, Willie Viljoen wrote:
> I'd previously posted to freebsd-fs list about this problem, I keep
> loosing data and having stability problems with a CMD-649 PCI ATA-100
> offboard IDE controller.
I'm using several of these; one of which is used to boot 4.4R on an old
pre-UDMA chipset board. They're not getting heavy use though...
{...}
> I'm down to one last option, being trying to run the drives at low speed
> with old 40-conducter cables, just to try and force this controller to
> slow down.
man ata(4) shows a sysctl which could be used to force PIO mode for
testing. 40 wire cables should force the controller back to UDMA-33.
> It claims to be ATA-100, but when booted in windows, the driver is trying
> to run it in what it calls "UDMA mode 5", which to my best knowledge is
> ATA-133, which neither the drive (a 40GB Seagate ST340810A 5400RPM) or the
> controller supports.
UDMA mode 5 is ATA-100.
If going slower helps, keep in mind that >UDMA-33 is sensitive to cable
length as well as cable/connector quality, so if you haven't already tried
changing 80 wire cables it might be worthwhile.
--
Andrew I MacIntyre "These thoughts are mine alone..."
E-mail: andymac@bullseye.apana.org.au | Snail: PO Box 370
andymac@pcug.org.au | Belconnen ACT 2616
Web: http://www.andymac.org/ | Australia
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