DOS FAT

• One file allocation table describes the layout of the entire disk.

• Each entry in the table refers to a specific cluster within a file.

  • zero says cluster not used.
  • not zero says where the next FAT entry for the file is.

• A file’s directory entry points to the first FAT entry for the file.

File Allocation Table

The FAT is on disk

in a special sequence

blocks.

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