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8. Where is the First FAT Cluster?


  • The first cluster is Cluster 2

  • Actual location of cluster 2 is different in FAT12/16 and FAT32

  • Assume cluster size = 2,048 B (4 sectors)

  • Assume that data area starts at sector 1224

  • First sectors of data area are reserved for the Root Directory

    • Size is established at boot time

  • Cluster 2 starts after Root Directory

  • Root directory is set at 32 sectors

    • Occupies sectors 1,224-1,255

  • FAT12/16 Cluster Example:

      FAT12/16 Cluster Example

  • Cluster 2 starts at sector 1,256

  • Cluster 3 starts at sector 1,260

  • Cluster 4 at 1,264...


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