NDS-4600 Changing Zoning
Overview
Thanks to a note and a good find by /u/DerUlmer I can now say there is a known way to change the zoning for the NDS-4600:
See the section for "Changing the zoning"
https://blog.carlesmateo.com/2019/06/07/dealing-with-performance-degradation-on-zfs-draid-rebuilds-when-migrating-from-a-single-processor-to-a-multiprocessor-platform/
Steps
Note: I've not tested this (yet).