Running a `zpool scrub` on my mirrored NVMe SSDs. The image on the left is without heatsinks and the right is with heatsinks. Both graphs show a 50 minute time window.

Before installing heatsinks it took 15-20 minutes to scrub, and since, it's only 6 minutes. Perhaps the drives were thermal throttling?

Either way, €20 well-spent I'd say.

#zfs