You're SE should have access to detailed performance comparisons between the various raid types supported by the 3Par. I sugguest you utilize that free resource to get the results from more thourough testing to answer your question.
Here we tested 3Par's Raid 5 3+1 against a competitors disk based Raid 6. This information is provided as-is, without any promises, committments or obligations to accuracy. Our environment is unique to us, but unlike most vendor benchmarks, mine actually compares 2 storage vendors using identical tests and equipment. You are strongly encouraged to perform your own benchmarks in your own environment to obtain your own results.
8k "Fifty-Fifty" refers to 8k io blocks, 50% read 50% write, 50% sequential 50% random patterns. We used IOmeter and aprox 8 SAN attached Windows hosts to generate the load. All luns were spread accross all spindles, no isolation/segregation was done. Each test machine had 4 luns each of different sizes ranging from 100g to 2 TB. Each LUN was filled to capacity with random data to eliminate "Fake Reads" due to thin provisioning utilized by both test systems.
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