Sleeping hard drives in an array?

["Greg Cormier" <gcormier@xxxxxxxxx>]

Is it possible to sleep hard drives in an array?

I have a HTPC at home that's on 24x7. It does all my torrenting as
well, and is mainly a media server.

Can I sleep the drives in my RAID5 array while it's not being used?
It's an XFS partition.

I have each drive set as

hdparm -S240 /dev/sdX

But I'm fairly sure they are not spinning down :( Is there some
activity mdadm is doing in the background?

These things are probably idle 22 hours of the day.


Thanks,
Greg
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