[CentOS] drive to standby after idle timeout?

I'd like to to put the hard drives in standby mode during periods of no activity. I'm just running a file server plus a couple small things on a Qube 3 from home, although the web stuff will increase it's still minimal.

On my NetBSD systems I can use atactl to do this via:

mount -u -o async,noatime,nodevmtime / mount -u -o async,noatime /usr atactl wd0 setidle 5

[wait a time] # atactl wd0 checkpower Current power status: Standby mode

I looked at smartctl but it doesn't look like I can set idle time with it, just readout status and perform self-tests. Is there a way?

Thanks!

Brian