File corruption on uploaded files occuring (even under light load)

From: Stefan Haglund (stefan.haglund_at_crystalnorth.com)
Date: 03/25/05

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    Date: Fri, 25 Mar 2005 17:00:52 +0100
To: freebsd-questions@freebsd.org

    I have an IWILL KK266-R (VIA KT133A/686B) board with an 1.4GHz processor
    running as a FreeBSD file & web server. The NIC is an Intel EtherExpress
    PRO/100 (I think it's called, fxp anyway). This board has an AMI RAID
    controller (CMD 649) onboard, which I use for all four drives (although
    not in RAID).

    My problem:
    Files uploaded to this server are sometimes corrupted. It doesn't have
    to be under high load, like directly uploading from a computer. It can
    also occur when I'm downloading from the internet on a computer, and
    save the file to the server. Another thing that is wierd, is that when
    the computer is fresh from a boot, there is always a few netstat Oerrs
    (5-30 I've seen this far) errors occuring when downloading or uploading,
    and never again.

    I have run mprime stresstest for a good while, with no complaints. I
    have also tried another NIC, and also moving the NIC to other PCI slots.
    I've tried with kernels without APIC, tried disabling ACPI, and I've
    also disabled throttling. My friend is running a similar setup on his
    server, although a KT266A chipset, and no RAID controller (southbridge
    IDE), and it is solid as a rock.

    Anyone have any ideas what might be causing these corruptions? Chipset?
    NIC? RAID controller?

    Regards,
    Stefan Haglund

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