Operating Systems · Storage and I/O

File system implementation

How a real file system, FFS, FAT, NTFS, lays out inodes, directories, and data blocks on disk.

Also known as: FFS, FAT, NTFS, block allocation.

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• The file system abstraction: Files and directories as the OS's user-facing model, sitting on top of raw disk blocks.

Leads to

• Crash consistency and journaling: Keeping the file system's on-disk structures coherent after a crash, via journaling or fsck-style checking.

Related topics

• Crash consistency and journaling: Keeping the file system's on-disk structures coherent after a crash, via journaling or fsck-style checking.