You might be interested in this article which does mention valid points for choosing mirrored data instead of any RAIDZ levels in ZFS: https://jrs-s.net/2015/02

You might be interested in this article which does mention valid points for choosing mirrored data instead of any RAIDZ levels in ZFS: https://jrs-s.net/2015/02/06/zfs-you-should-use-mirror-vdevs-not-raidz/ https://jrs-s.net/2015/02/06/zfs-you-should-use-mirror-vdevs... It certainly made me reconsider my ZFS practices.