Thanks for the hint! I've made a user script with following content in order to run after first array start: #!/bin/bash #from testdasi (https://forums.unraid.net/topic/41333-zfs-plugin-for-unraid/?do=findComment&comment=875342) #echo "[pool]/[filesystem] /mnt/[pool]/[filesystem] zfs rw,default 0 0" >> /etc/mtab #just dump everything in for n in $(zfs list -H -o name) do echo "$n /mnt/$n zfs rw,default 0 0" >> /etc/mtab done