Figure 1: 1.2-Gb disk physical partition distribution

----------------------------------------------------------   58
|  regions    |   outer | outer | center | inner | inner |   57
|             |   edge  | middle|        | middle| edge  |   57
----------------------------------------------------------   57
|  physical   |         |       |        |       |       | + 58
| partitions  |    58   |   57  |   57   |   57  |   58  | ----
----------------------------------------------------------  287
287 physical partitions of 4 Mb each for 1148 Mb.