[cctalk] ZFS, was [... GreaseWeazle ..]

That reminds me (looks at 43.5T of zfs pool that has not had a scrub since 2021). It can be nice to have a filesystem which handles redundancy and also the option to occasionally read all the data, check end to end checksums (in the unlikely case a device returns a successful read with bad data), and fixup everything. Does not eliminate the need for remote copies, but gives a little extra confidence that the master copy is still what it should be :)