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    SubjectRe: [BUG 2.6.21-rc3-git9] SATA NCQ failure with Samsum HD401LJ
    Christian wrote:
    > I've tested multiple kernels (including -mm series) in the range of 2.6.19.7
    > (before sata_nv adma support went in) up to 2.6.20-rc4.
    > Every NCQ enabled kernel I've tested showed ata errors in dmesg. So I came to
    > the conclusion that my system was faulty. I ran memtest86+ for a long time,
    > but no errors were found. After some fiddling with my HW I discovered that
    > the nforce chipset fan induced some kind of electro magnetic interference to
    > the southbridge, which could clearly be heard as a low frequency noise if I
    > plugged in my speakers to the onboard sound. After replacing the fan, my
    > system is stable again. Now running 2.6.21-rc3-mm2+rsdlv31 without errors.
    > Really strange problem he ;-)

    Man, that's the strangest way to solve ATA command failures I've ever
    heard of. Kudos to you for finding it out. :-)

    --
    tejun
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