my point was that a zpool scrub can run for days with a constant low background hum and two aspects of external usb enclosure design AND chipset design supposed that kind of access pattern would never happen.
this is much less of an issue today than several years ago, probably because usb is improving and because 10 gigabit isn’t as fast as it used to be
sidenote: there were access patterns discovered to murder mechanical disks. Think rowhammer, but for spinning rust. That was mostly solved and not forgotten since the 80s tho.