Messages in this thread | | | Date | Thu, 02 May 2002 20:19:04 +0200 | From | Martin Dalecki <> | Subject | Re: IDE hotplug support? |
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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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