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RAID 3 vs. RAID 5 - performance?	by Myke	2006-03-24 07:45:41
Myke, I have never used RAID 3 but in talking	by classic_jon	2006-11-19 12:55:59
with people previously about this and checking some of my information the RAID-3 is a good trade off if you can not get RAID-5. It has a very low impact if it loses a drive but is very dependant on the Spindles of the Raided drives being syncronized and the parity drive being a bottleneck in random reads and writes. I read somewhere that if you lose the parity disk the whole array dies but I think that was limited to that particular hardware controller and not to RAID-3 in general...it wouldn't be an effective RAID if it had a single point of failure would it :) If you are going to use the RAID-3 in software be prepared to take a performance and CPU hit as it is not the most efficient thing via software RAID even in *Nix. The closest thing I found in a quick search with real life application was this. RAID 3 in HPC
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