Notice:
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| Section | Contents | Offset (sector number) | Size (in sectors) |
|---|---|---|---|
| Main Boot Region | Boot sector | 0 | 1 |
| Extended Boot Sectors | 1 | 8 | |
| OEM Parameters | 9 | 1 | |
| Reserved Sectors | 10 | 1 | |
| Boot checksum | 11 | 1 | |
| Backup Boot Region | Boot sector | 12 | 1 |
| Extended Boot Sectors | 13 | 8 | |
| OEM Parameters | 21 | 1 | |
| Reserved sectors | 22 | 1 | |
| Boot checksum | 23 | 1 | |
| FAT Region | FAT Alignment | 24 | FATOffset - 24 |
| First FAT | FATOffset | FATLength | |
| Second FAT | FATOffset + FATLength | FATLength * (NumberOfFATs - 1) | |
| Data Region | Cluster Heap Alignment | FATOffset + FATLength * NumberOfFATs | ClusterHeapOffset - (FATOffset + FATLength * NumberOfFATs) |
| Cluster Heap | ClusterheapOffset | ClusterCount * 2SectorsPerClusterShift | |
| Excess Space (to end of partition or disk) | ClusterheapOffset + ClusterCount * 2SectorsPerClusterShift | VolumeLength - (ClusterHeapOffset + ClusterCount * 2SectorsPerClusterShift) |