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    SubjectRe: [3/6] 2.6.21-rc2: known regressions
    Mathieu Bérard wrote:
    > Jeff Garzik a écrit :
    >> Adrian Bunk wrote:
    >>> Subject : NCQ problem with ahci and Hitachi drive
    >>> References :
    >>> Submitter : Mathieu Bérard <>
    >>> Status : unknown
    >> according to the last message in that thread, it sounds like ACPI and
    >> interrupt problems
    > Hi,
    > after more testing with a 2.6.21-rc3, it appears that after several ata
    > errors the boot process
    > somehow continued as normal, after a "NCQ disabled due to excessive
    > errors" message.
    > "pci=noacpi" or "noacpi" parameters workarounds the problem "irqpoll"
    > does nothing.

    I was mistaken. It can't be IRQ routing problem. I somehow thought the
    port was a ata_piix one. Considering the reported broken NCQ feature on
    the device GTF might be mangling with the drive to disable NCQ or
    something. Does giving "libata.noacpi=1" make any difference?


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