What's the RAID 5 to 6 upgrade path with QuTS hero?
I'm planning to purchase a TS-673A along with three 28TB drives to replace my existing video archive (raw video from various projects). I'm leaning toward RAID 5 to start because I'm cheap and also plan to maintain my old NAS as an offsite backup. ZFS benefits with QuTS hero are also very appealing.
I'm getting conflicting info from chatbots about what shifting to RAID 6 down the road might look like. Could I just add a fourth 28TB drive and tell the NAS to make the array RAID 6? I understand there'd be downtime but no data loss. Is there a wrinkle I'm missing here?