I've got a lvm volume, which is composed of two hard drives enclosed in external enclosure connected through usb.
As it's external and not used too much, I like to spin it down if it is not used.
I'm using Linux Mint 18.3
Disk utility (gnome-disk-utility) doesn't support disk power management on disks containing lvm volumes.
I can do it with command
hdparm -y /dev/sde /dev/sdf
I can check beforehand if there is any process accessing mounted volume through
fuser -m /dev/lvm/volume
Is it safe to run
hdparm command on lvm volume in such a situation?