Checksumming is like a myth on HN already. No, it's not useful on its own to the user or to the filesystem, but it is useful to the filesystem if it can transpa

Checksumming is like a myth on HN already. No, it's not useful on its own to the user or to the filesystem, but it is useful to the filesystem if it can transparently heal the data. Whole disk replication doesn't address your reliability concerns as much as you think either, doesn't work all that well in general and is a burden to maintain. Doing it properly requires treating the filesystem as a distributed system where disks can join and leave, where everything is sharded, where rebalancing, self-healing, syncing, resyncing is all automatic and blazing fast. And so on. Nowadays most of the work in storage systems is in distributed systems, and local filesystems are treated as just another unreliable layer. Hope this gives you some ideas why there are no filesystems like that.