There is very little difference between these two types of RAID, except as regards the performance degradation due to possible failure. RAID 30 is indeed lower rates of reconstruction in RAID 03, but still higher than RAID 10. It is However, widely used for very large databases stored on large file servers. RAID is a dear, I do not like because its performance is poor in terms of writing, including random, especially due to the bottleneck due to RAID 3, which has a dedicated parity disk. This RAID can be interesting reading, especially random, if the size of the strip is wide enough. However, this RAID is a real catastrophe in writing ...
We note the trade name usurped RAID 53, which is actually a RAID 03. I do not dwell here on the poor performance of this level reserved for storage of large volumes of files with a low refresh rate.
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