Just noticed ZFS scrub has been running for over a week. 😐
root@es3:/pool1/master# zpool status
pool: pool1
state: ONLINE
scan: scrub in progress since Sun Oct 13 00:24:02 2019
3.85T scanned out of 4.91T at 5.57M/s, 55h45m to go
0B repaired, 78.32% done