[atmosx]

I wonder if they use something like CARP[^1] for redundancy. Also, strikes as odd that they didn't go with ZFS for storage, makes FS management _way_ easier for engineers who don't spent all their on these kind of operations.

[^1]: https://www.freebsd.org/cgi/man.cgi?query=carp&sektion=4

[dsr_]

You might ask what sort of filesystem maintenance they ever need to do. Replacing a disk is covered by the mirror. Backup is straightforward. The second system covers a lot more. If they need to increase hardware capacity, they can build new systems, copy in the background, and swap over with a few minutes of downtime.