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In: Computer Science

Explain the file system structure of a standard SD card. What is an SD Card?

Explain the file system structure of a standard SD card.

What is an SD Card?

Solutions

Expert Solution

Ans) SD(Secure Digital) Card:- It is a portable, non-volatile memory card that is used in various devices like camera, mobile, etc for providing memory storage solutions

File system structure of a standard SD card:-  File system Structure basically means the way in which files are named and stored in a particular device such that they are stored and retrieved logically without which the files are no longer accessible and becomes isolated for lifetime hence File system Structure is important part of a storage device

For Standard SD card :-

  1. (BP 0 to 2) Jump Command
  2. (BP 3 to 10) Creating System Identifier
  3. (BP 11 and 12) Sector Size
  4. (BP 13) Sectors per Cluster
  5. (BP 14 and 15) Reserved Sector Count
  6. (BP 16) Number of FATs
  7. (BP 17 and 18) Number of Root-directory Entries
  8. (BP 19 and 20) Total Sectors
  9. (BP 21) Medium Identifier
  10. (BP 22 and 23) Sectors per FAT
  11. (BP 24 and 25) Sectors per Track
  12. (BP 26 and 27) Number of Sides
  13. (BP 28 and 29) Field reserved for future standardization
  14. (BP 30 to 509) Field reserved for system use
  15. (BP 510 and 511) Signature Word
  16. (Extended FDC Descriptor BP 28 to 31) Number of Hidden Sectors
  17. (Extended FDC Descriptor BP 32 to 35) Total Sectors
  18. (Extended FDC Descriptor BP 36) Physical Disk Number
  19. (Extended FDC Descriptor BP 37) Reserved
  20. (Extended FDC Descriptor BP 38) Extended Boot record Signature
  21. (Extended FDC Descriptor BP 39 to 42) Volume ID Number
  22. (Extended FDC Descriptor BP 43 to 53) Volume Label
  23. (Extended FDC Descriptor BP 54 to 61) File System Type
  24. (Extended FDC Descriptor BP 62 to 509) Field reserved for system use
  25. (Extended FDC Descriptor BP 510 and 511) Signature Word

The File Allocation Table supports both the 12-bit FAT and the 16-bit FAT by above specified structure we can get idea of what an standard SD card file system looks like in order to manage( store and retrieve) data properly and following a logical schema


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