Messages in this thread | | | Date | Thu, 3 Apr 2003 21:22:50 +0200 (CEST) | From | Stephan van Hienen <> | Subject | Re: RAID 5 performance problems |
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On Thu, 3 Apr 2003, Ross Vandegrift wrote:
> > I've benchmarked RAW disk speeds with an Ultra-100 and > > WD1200JB drives, and gotten 50MB/S from each disk, as opposed to your > > 26MB/S (there should be almost no difference for the BB drives). > > Makes perfect sense - he's getting 50M/s to each channel, but it's split > over two drives, so drive throughput is about halved. the fasttrak-tx4 is an 4 channel controller (it is an dual ultra-100 on 1 pci board) Jonathans WD1200BB's should be a bit faster than 30MB/sec maybe, but the main problem is his /dev/md0...
> Absolutely correct - you should *never* run IDE RAID on a channel that > has both a master and slave. When one disk on an IDE channel has an Jonathan is only using master devices, no slaves... - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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