How to find a RAID level 6 scheme with ten disks such that it is possible to recover from the failure of any three disks simultaneously?
Actually the question is from the book: Database System Implementation by Hector Garcia-Molina (exercise: 2.6.13)
RAID 6 consists of block-level striping with double distributed parity. So, it tolerates two disks failures only (one more disk than Raid 5).
In summary, it is not possible for Raid 6 to survive three disk failures. Increasing number of disks to ten (for example) just adds more capacity and does not improve availability (redundancy).
