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    SubjectRe: SATA repeated failure (command 0x35 timeout, status 0xd8)
    Molle Bestefich wrote:
    [--snip--]
    > The above repeats itself thru modes UDMA/66, UDMA/44, UDMA/33,
    > UDMA/25, UDMA/16, PIO4, PIO3, PIO1 and PIO0.

    Can you full dmesg for this? Preferably w/ timestamp?

    > At which point /dev/sdb disappears completely, only to reappear as
    > /dev/sdh:
    > ===============
    > SCSI device sdh: 398297088 512-byte hdwr sectors (203928 MB)
    > sdh: Write Protect is off
    > sdh: Mode Sense: 00 3a 00 00
    > SCSI device sdh: drive cache: write back
    > SCSI device sdh: 398297088 512-byte hdwr sectors (203928 MB)
    > sdh: Write Protect is off
    > sdh: Mode Sense: 00 3a 00 00
    > SCSI device sdh: drive cache: write back
    > ===============
    >
    > (Odd.)
    >
    > I don't get why PowerMax works this drive just fine while Linux
    > doesn't. Perhaps because PowerMax only uses SMART commands and
    > doesn't transfer data over the SATA bus?
    >
    > Anyway, with the device now failing fairly consistently, I guess I
    > should begin moving around cables, controllers, disks etc. again. I'm
    > very worried about doing this though, since I'm pretty sure that it'll
    > break the MD array on the disks very quickly..

    Your problem seems to be hardware transmission error. I don't know what
    a powermax is and doesn't know what it does, so you'll have to play the
    swap-and-see-what-breaks game to figure out the problematic part.

    Thanks.

    --
    tejun
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