by chrryd » Sat Apr 27, 2019 10:45 am
I had something similar happening on a couple of different pools (one a pool of stripped mirrors, the other a RAIDZ2 pool) - it turned out a disk in each pool had started giving some SMART warning signs (I can't remember exactly which, but I think it was raised Reallocated Sectors Count numbers). I swapped out those disks, and scrubs went back to completing with no resilvering. I'd suggest checking your SMART stats for your disks using something like smartmontools.