ZFS Software RAID compared to Hardware RAID
Robert Milkowski compares ZFS’ software RAID-Z to hardware RAID in a great series of articles: Part 1, Part 2.
These tests show that software RAID-5 in ZFS can not only be as fast as hardware RAID-5 it can even be faster. The same is with RAID-10 – ZFS software RAID-10 was faster than hardware RAID-10.