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Documentation of the superblock format
Sorry, but we kernel coders have trouble with long words like "Documentation".
Little ones like "Code" and "bugs" and even "test" are fine. But "Doc-u-men-ta-ion"... too long :-)
There is a linux-raid wiki somewhere. Maybe you could try to add stuff there. Or wikipedia if that is your preference. If you send me a pointer I'm happy to tell you which bits are wrong...
- serial numbers dunno - doesn't really excite me I guess. Maybe if I had a clear idea of the use-case.
- sync-as Yes, this is probably the most-asked-for feature for md. You'd need to be careful that the partial-synced drive never got accidentally mistaken for the real drive (e.g. crash in the middle of resync). This should be safe enough with the metadata at the end of the device, but if the metadata is at the start and gets copied first...
