Messages in this thread | | | Date | Fri, 4 Jan 2002 10:28:18 +0100 (CET) | From | Krzysztof Oledzki <> | Subject | Re: Two hdds on one channel - why so slow? |
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On Wed, 2 Jan 2002, Mark Hahn wrote:
> > yes, I know what he said. it's true that there's no concurrency, > but he's wrong about expecting half (due to readahead/writebehind), > and there's no real overhead in switching. So why my disks work with ~12MB/sec per device (~24 per channel) when both HDDs are accessed on the sime time?
> in short, master-slave concurrency is not common (but definitely > supported by the standard and some disks), but this has less > effect than you'd think. especially since most people just > treat ide as a single-drive ptp link. which works fine, since > ide channels cost $15 or less, and ide disks are *so* much cheaper > than scsi.
Yes. IDE as a PtP device works nice. But this means that in most cases it is possible to connect only half of expected devices. What a pity :(
Best regards,
Krzysztof Oldzki
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