ReadyNAS RN 104 Automatic FAN-Control

xeltros wrote:

My RN104 is telling me FAN : 787 RPM, CPU : 53°c, HDD1 : 37°c, HDD2 : 41°c, HDD3 : 40°c, HDD4 : 37°c. He is sitting idle right now (not home) but I've never seen it going over 78°C. I believe disks are quite tolerant to high temperature. I think I remember a google study saying that anything below 45°c is optimal to avoid disk failure, so 44°c is still good ;) and even if it goes to 47-48 I don't think this will really matter. As for the SoC, I believe marvell took some margin when releasing the spec. I don't think we really risk anything with this (Netgear has a 3 year warranty on the hardware for the RN104 I recall). I believe if they were having any doubt they would have set the threshold 5°c lower and bump the fan speed by 50-100RPM just to be safe.

I agree that the drives can sit quite happily around 40°C and the SoC at 53°C for quite some time. The fact of the matter is that heat shortens the life of components though. With no modifications my drives and NAS may last 5 years each, but by that time the warranty on both items have expired :( If I can run the fan a little faster and replace it when the bearings are shot I may be able to get another year or two out of the drives and NAS :)