On 24/11/2020 18:32, John Pierce wrote: > zpool create newpool mirror sdb sdc mirror sdd sde mirror sdf sdg mirror > sdh sdi spare sdj sdk > zfs create -o mountpoint=/var/lib/pgsql-11 newpool/postgres11 > > > and done. This *might* be a valid answer if zfs was supported on plain CentOS... (and if the question hadn't involved an existing RAID ;-) ). Or did I miss something? peter