20. The superblock

• Located at the beginning of the file system:

  • 1,024 bytes from the start of the file system

  • 1,024 bytes in size (most of the bytes are not used.)

• The superblock contains:

  • file system size

  • file system configuration

• The superblock is similar to the boot sector (aka volume boot record) in NTFS and FAT file systems on Windows.

  • (However, the Linux/UNIX superblock does not have any boot code.)