How do I monitor what my array disks are doing?

[Stubbs]

I want to power down my Disk 1 because it keeps running hot and I'm not upgrading my case for at least a month.

 

The problem is it keeps making small reads every 7-8 seconds and I don't understand why. Even when nothing should be using it, it's still making reads. I assume it's maybe some kind of background check in a docker application, in which case, how can I tell which container is making these reads?

[JorgeB]

Check if the docker image or appdata are using it, those are best moved to a cache device, if one exists.