The sensor is located on the case (not near the exhaust) of the server. With the structure of my appartment this is the only place I can realistically put my Server but sadly also the hottest place in my appartment.
The outside temperature is supposed to reach 36°C today so I expect the ambient temp for the server to rise another 2-3 degrees.
Just yesterday I took measures to keep temp down further, powersave cpu governor, always full fan speed, 12 disks go to sleep after 60 min of inactivity and I removed dust for better ventilation. My NAS/server is in the attic and today theres 37°C outside
Disks were around 50°C which is too hot
That will kill your drives far sooner than a temperature spike. load/unload cycles is one of the biggest HDD killers.
I hobestly don’t know how much of this temperature is the server and how much is just it beeing in a badly ventilated spot under the ceiling.
I don’t really do disk spindown as they are active most of the time anyways (Zfs spends most of the time scrubbing).