Server Watch好文：Restoring the Romance of RAID

Restoring the Romance of RAID

其中對於為何需要RAID 6，作者提出相當重要的看法：

"RAID 6 is especially critical in Serial Attached SCSI (SAS) environments where systems often implement lower Mean Time Between Failure (MTBF) SATA spindles in combination with enterprise SAS hard disk drives."

"RAID 5 had a limit of somewhere between 10 and 14 drives in one system," says Richard Scruggs, HP's product manager for server storage. "RAID 6 enables you to use as many drives as you want, with a theoretical limit of 40,000 drives."

我好像從來都沒有去計算MTBF和磁碟array的理論陣亡率....orz