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    SubjectRe: Testing IDE-TCQ and Taskfile - doesn't work nicely:)
    Bartlomiej Zolnierkiewicz wrote:
    > TCQ shouldn't be enabled on hdc, you have two drives on second ide
    > channel and current TCQ driver design allows only one drive per channel,
    > so proper fix is to not enable TCQ :-).

    IMO the best rule is "enable TCQ if and only if 100% of the channel
    supports TCQ".

    So, two drives on the same channel can do TCQ, if and only if they both
    support TCQ. That's a big benefit of bus release, after all,
    simultaneously servicing multiple drives. The device-select and service
    interrupt semantics are annoying but doable.


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