Some questions about HDD temperatures in server cases

[SmokeyColes]

Hi 

 

So I got the new case today - great!  CPU is here too, but no motherboard yet.

 

In my test rig I have noticed it generates a lot of heat (8x 3.5" HDDs), and the HDDs temperatures read between 32 and 36degC.  The thing is there must be about 1cm between each drive in my fractal test-rig case with anti-vibration pads.  This new case has hot swaps and the drives fit flush, there is 1mm gap, and no vibration pads and I guess I am a little concerned with the SAS backplane as you can see (only on the far left side is a small gap of 2cmx1cm - this may get toasty!

 

1. Is anyone else running a setup similar and do the HDDs get hotter than what I've suggested above?
2. Is there a way in UNRAID to see which disks are spinning up/spun up?  (Is it done by watching the READS/WRITES in the Main tab?) or is there a better way?
3. Is there a way to track the spin up (e.g. just for me to work out if it is acting how I think it is)?
4. Do you have any suggestions for temperature management?

 

Thanks

Chris