Date: Wed, 20 Sep 2000 18:39:00 -0500 From: David Uhring <duhring@charter.net> To: Kent Stewart <kstewart@urx.com>, Charlie Root <root@oblomow.demon.nl> Cc: freebsd-stable@FreeBSD.ORG Subject: Re: UDMA write errors on stable and release Message-ID: <00092018390000.00177@dave> In-Reply-To: <39C94161.19E4D26B@urx.com> References: <200009202229.e8KMThw12433@oblomow.demon.nl> <39C94161.19E4D26B@urx.com>
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On Wed, 20 Sep 2000, Kent Stewart wrote: > Charlie Root wrote: > > Hi, > > > > I am not sure if this is the right forum to ask, but since it concerns > > 4.1 stable I might as well try. > > > > Since switching to a new motherboard I get the following errors: > > > > Sep 14 22:37:27 oblomow /kernel.GENERIC: ad0: UDMA ICRC WRITE ERROR blk# > > 2523344 retrying Sep 14 22:37:27 oblomow /kernel.GENERIC: ad0: UDMA ICRC > > WRITE ERROR blk# 2535904 retrying > > > > Not only with this installation ( 4.1 Release ) but also with 4.1 stable > > (see attached messages file) > > > > I changed from an Abit AX5 motherboard with a K6 to an Abit KT7 with a > > Duron 600 (Via chipset). > > Eventually these errors disappear because the system decides to switch to > > PIO4 mode for disk access. I have gone through the mailing list archive > > and found several more reports about this, but no solution there. > > > > The cable used to attach these UDMA33/66 capable drives is new and not > > too long and should be capable of handling these speeds. The disks that > > worked are 2 * WDC AC34300L. I also tried a new IBM GXP 30 GB with the > > same result. > > > > Suggestions anyone? > > Do a "man ata" and learn how to use sysctl to turn off UDMA33+ on your > motherboard. The Via chips and the ata driver seem to be very > sensitive to some UDMA drive combinations. You can corrupt your data > in really bad situations, which occured at 4.0-Release, and degrading > to PIO 4 or using SCSI HD's seems to be the only solution at this > point. The sysctl commands go into /etc/sysctl.conf > > Kent > > > Marc Albers > > > > /var/log/messages: - - snipped - - I had the identical problem with 4.0-R on a FIC-VA503A MB using the VIA MVP4 chipset. Do you mean that the VIA KT133 chipset for the Athlon/Duron in UDMA66 mode is unsupported by FreeBSD, also? If so, this is really a shame because the UDMA66 chipset improves Bonnie benchmarks by 25-30% with OpenBSD and Linux. BTW, on a FIC PA2013 MB with the MVP3 chipset, FreeBSD fully supports UDMA33 mode, at least for the HD. Dave To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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