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docs: enrich on-disk format documentation#13

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SToPire wants to merge 1 commit intoerofs:mainfrom
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docs: enrich on-disk format documentation#13
SToPire wants to merge 1 commit intoerofs:mainfrom
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@SToPire SToPire commented Feb 27, 2026

Enrich the monolithic core_ondisk.md into modular files under src/ondisk/:

  • core_ondisk.md: core format (superblock, inodes, directories)
  • compressed_format.md: compression layout and features
  • chunked_format.md: chunk-based file format and multi-device support
  • xattrs.md: extended attributes handling

Remaining TBD:

  • may need more figures describing on-disk layout
  • Encoded Extents Mode not documented for now

Enrich the monolithic core_ondisk.md into modular files under src/ondisk/:
- core_ondisk.md: core format (superblock, inodes, directories)
- compressed_format.md: compression layout and features
- chunked_format.md: chunk-based file format and multi-device support
- xattrs.md: extended attributes handling

Signed-off-by: Yifan Zhao <yifan.yfzhao@foxmail.com>
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