The Inode Index

• Contains a mapping from inode numbers to the logical disk block that contain their info.
• Each entry on the disk occupies 4 bytes. Entry 0 contains the sector number of inode 1.
• Inode numbers are between 1 (the root inode) and 1024/4 + 1 (=257).
• Then why 4 bytes per entry and not less? for simplicity, and future extension.

Originally written by guy keren