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Date:      Tue, 16 May 2000 12:39:57 -0700
From:      Mike Smith <msmith@freebsd.org>
To:        Donald Burr <dburr@borg-cube.com>
Cc:        FreeBSD Questions <freebsd-questions@freebsd.org>, FreeBSD Hardware <freebsd-hardware@freebsd.org>
Subject:   Re: UDMA ICRC errors on FIC SD11 Athlon board and U66 HD -- huh?! 
Message-ID:  <200005161939.MAA02841@mass.cdrom.com>
In-Reply-To: Your message of "Tue, 16 May 2000 00:02:51 PDT." <Pine.BSF.4.21.0005152320320.797-100000@drone.collective.borg-cube.com> 

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> Ok, I just put together a new Athlon system, and am having a hell of a
> time trying to get the hard disks to work right.
> 
> First, some system details:
> 
> Motherboard: FIC SD-11 board rev. 1.8, with the latest BIOS.
> 	(AMD-751 north bridge, VIA 82C686 south bridge)
> CPU: AMD Athlon 650MHz.
> Memory: 128MB SDRAM DIMM
> Hard Disk: Western Digital Caviar WD102AA 10.2 GB Ultra66
> 	(single drive only, no slave devices or CD-ROM's etc.)
...
> ad0: UDMA ICRC WRITE ERROR blk# 27984ata0-master: WARNING: WAIT_READY
> active=ATA_ACTIVE_ATA
>  falling back to PIO mode

I'm seeing exactly the same symptoms, but with a slightly faster CPU and 
an IBM disk.  I'm not entirely sure what the real deal here is; it's 
possible that there may be eg. some timing values that aren't being set 
quite right for this board/chipset. 8(

-- 
\\ Give a man a fish, and you feed him for a day. \\  Mike Smith
\\ Tell him he should learn how to fish himself,  \\  msmith@freebsd.org
\\ and he'll hate you for a lifetime.             \\  msmith@cdrom.com




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