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Some of the advantages and disadvantages of assigning individual blocks for each entry in the file allocation table include the following: 


  • It uses the whole disk block for data.
  • A bad disk block will not result in all successive blocks lost.
  • Random access is provided 
  • Only FAT needs to be traversed in each file operation.


  • Each Disk block needs a File Allocation Table entry.
  • FAT size may be very big depending upon the number of FAT entries.
  • Number of FAT entries can be reduced by increasing the block size, but then this will also increase Internal Fragmentation in the system. 

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