Thanks to Dylan there's now a grammar available for the EXT2 file system.
EXT2 (Extended File System 2) is a widely used file system in Linux operating systems. It was developed as a successor to the original EXT file system, and it was the default file system for many Linux distributions. It is a robust and reliable file system that has been in use for many years.
The new grammar is not yet complete but contains the basic building blocks of EXT2. It can be used as a foundation for a complete EXT2 grammar.
You can download the grammar on this page: Synalysis Grammars.