I am not familiar with the "new version" of RAID 5, but I doubt that it will mitigate the write-performance penalty inherent in this technology. All writes to a RAID 5 system incur significant overhead in two ways: first, to calculate the checksums required for data redundancy; second, to write the checksums to disk. Performing these tasks is always going to take more time than not performing them, regardless of how and where they're done. Having said, that, however, if you have details on the technology to which you refer, please send them along. If there's a performance comparison with, say, RAID 1+0, that shows RAID 5 performance to be equivalent, I'll post a follow-up.
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