Until now I didn't test it myself, but since several people are annoyed
by WD's drive killer, it might be interesting for this list.
In a German Arch forum,
https://bbs.archlinux.de/viewtopic.php?pid=300934#p300934 , I get the
hint that there is idle3ctl -d, see the English Arch Wiki,
https://wiki.archlinux.org/index.php/Advanced_Format#Special_Consideration_…
.