Zfs

ZFS is a filesystem and volume manager.

It has advanced features like scrubbing/repairing data, and RAID setups.

Documentation

apropos zfs	there are several man pages related to zfs
man zpoolconcepts	device types, statuses, recovery, etc
official docs	https://openzfs.github.io/openzfs-docs/
oracle/solaris official docs	https://docs.oracle.com/cd/E26505_01/html/E37384/index.html
freebsd docs	https://www.freebsd.org/doc/handbook/zfs.html
homepage	https://openzfs.org/wiki/Main_Page

Notes

zfs overview

zfs usage

zfs configuration

zfs configurations

zfs backups

zfs utils

zfs troubleshooting