This brings me back to my original dilemma of which file system/setup I should use.
I have good experience with mdadm raid6/ext4 as this is what I have been running for years. No issues, no trouble rebuilding the array, no trouble growing the array..... no issues when I have had to hard reboot the system.
ZFS is definitely interesting so this is why I am giving it a try. However it is not native to OMV and I won't use some of its features like snapshots.
I typically use Rsynce and Rsnapshot for backup to other storage (soon to be my old system).
I am still not sure that ZFS is the right choice as mdadm raid 6 using ext4 or maybe even using the other linux native filesystems btrfs or xfs would not be better ?????
Other than the typical home and media files this system is also used for my wife's business (wedding, events, etc... photos and video). Now that everyone has moved to 4k the raw files are huge which is why I built the bigger storage array and also for the workstations they will use 10GB lan. 4 people moving up to 100 GB files does take some time over standard gigabit.
All the business files are backed up to second storage and also depending on the final product size are put on USB drives.
So again not sure what benefits ZFS would offer me ..... bitrot ? better data protection ? file system repair?