I heard that the NTFS file system is basically a b-tree. Is that true? What about the other file systems? What kind of trees are they?
Also, how is FAT32 different from FAT16?
What kind of tree are the FAT file systems using?
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ext3 and ext4 use “H-trees“, which are apparently a specialized form of B-tree.
BTRFS uses B-trees (B-Tree File System).
ReiserFS uses B+trees, which are apparently what NTFS uses.
By the way, if you search for these on Wikipedia, it’s all listed in the info box on the right side under “Directory contents”.