And here are the results of the copying test:
The four-disk RAID0 has an inexplicable performance slump when copying the ISO pattern. In the other patterns the RAID0 shows performance scalability. The RAID5 arrays are slower, but also scale up in performance depending on the number of disks per array.
The results of the copy far test do not differ much from the Copy Near results, including the slump in speed of the four-disk RAID0 with the ISO pattern.