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    SubjectRe: Silicon Image 3112A SATA trouble
    Bartlomiej Zolnierkiewicz wrote:
    > On Sunday 30 of November 2003 17:51, Jens Axboe wrote:
    >>>Tangent: My non-pessimistic fix will involve submitting a single sector
    >>>DMA r/w taskfile manually, then proceeding with the remaining sectors in
    >>>another r/w taskfile. This doubles the interrupts on the affected
    >>>chipset/drive combos, but still allows large requests. I'm not terribly
    >>
    >>Or split the request 50/50.
    >
    >
    > We can't - hardware will lock up.

    Well, the constraint we must satisfy is

    sector_count % 15 != 1

    (i.e. "== 1" causes the lockup)

    Beyond that, any request ratio should be ok AFAIK...

    Jeff



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