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Date:      Tue, 01 Apr 1997 18:57:50 -0800
From:      David Greenman <dg@root.com>
To:        Jaye Mathisen <mrcpu@cdsnet.net>
Cc:        hackers@freebsd.org
Subject:   Re: de driver problems/ CRC errors with 2.2.1-RELEASE 
Message-ID:  <199704020257.SAA21240@root.com>
In-Reply-To: Your message of "Tue, 01 Apr 1997 17:14:09 PST." <Pine.NEB.3.95.970401170625.12884d-100000@mail.cdsnet.net> 

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>Digital HX6000, P6200/512, 32MB RAM, onboard Adaptec 7880, UW's, Toshiba
>12X CDROM, 1 2GB seagate Barracude (wide), 1 SMC dual port 10/100 card.
>
>This box is hooked to a 3COM Superstack II Switch 3000, (A 100MB switch).
>
>Any heavy NFS access (like via iozone on NFS partition) generates
>kazillions of CRC align errors, at the rate of 30-40/second.  (At least,
>according to the 3com switch, and the output of netstat).
>
>lighter access doesn't seem to do it.
>
>For example, running bonnie, the putc phase generates oodles of errors,
>but the rewrite phase generates maybe 1 or 2 per page of output.
>
>
>Any tips appreciated, I've been happy with the de driver, but this
>is not acceptable or usable.
>
>
>BTW, I took a box with a much older 2.2 kernel, from around October or so,
>and plugged it in, and zero problems.  So it seems like a moderately
>recent development.

   Try forcing half duplex on the switch port.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project



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