Changes to 16-SEP-2012: RAID Allocation Guide between r2 and r3

&| A   | B    | Redundancy | Space Overhead |% --> %| A   | B    | Redundancy | Space Overhead |%
| 0    | 0    | 1          | 0 %            |

Legend

     Only in r2
     Only in r3
     -->      Modified slightly between r2 and r3