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    SubjectRe: IDE hotplug support?
    Uz.ytkownik Pavel Machek napisa?:
    > Hi!
    >
    >
    >>I came across a nice case from procase, supporting 16 IDE drives in
    >>(so-called?) hotplug frames. Problem is... How will linux trat this?
    >
    >
    > Should be okay. Hdparm can force spindown and bus rescan, and that's
    > basically what you need.
    >
    >
    >>I plan to use 15 drives in a RAID-5, assigning the last 16th drive as a
    >>spare.
    >
    >
    > 8 controllers? hmmm...

    15 drives == 16 interfaces == 8 channels == 4 controllers
    with primary and secondary channel.

    He will have groups of about 4 drives on each channel wich
    serialize each other due to excessive IRQ line sharing and
    master slave issues.

    8 x 130MBy/s >>>> PCI bus throughput... I would rather recommend
    a classical RAID controller card for this kind of
    setup.

    The request aliasing effects will be almost for sure disasterous
    to overall system performance.

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