ACM Queue : "Triple-Parity RAID and Beyond" by Adam Leventhal
Adam Leventhal wrote a great article about the reasoning of triple parity RAID for ACM Queue, the publication of the Association of Computing Machinery, with “Triple-Parity RAID and Beyond”:
If Kryder's law continues to hold, the burden of correctness will increasingly shift from the hard-drive manufacturers to the RAID systems that integrate them. Today, RAID reconstruction times factor into reliability calculations more than ever before, and their contribution will increasingly dominate. Triple-parity RAID will soon be critical to provide sufficient reliability even in the face of exponential growth.