That old Panaflo fan is really good. Fluid bearings, Panaflo makes the best 80mm fans I have ever used. Haven't had any experience with their 60mm fans but I assume they are good as well.
So unless it's worn out, don't throw it away.
Small blade area = high pressure which can be useful in a small tight space with a lot of resistance.
I don't think 3Com put it there by accident. That's an enterprise switch so reliability and adequate cooling is a priority, low noise is not.
thanks for the reply
the case is pretty hollow , there doent need to be alot of presure. the fans are used as an exaust, and if i put my hand near the intake vent on the other side i can feel the air, and the air coming out is very close to room temp, so i think there is enough air being moved, im gona keep an eye the switch to check everything is ok
i dont know about the condition of them, just they were very noisy for the amount of air they moved.
I have kept them im gona run them out of the case, just to check there in good enough condition to sell or use again.
edit: just ran them out of the case, they seem in good nick, they just sound like a fast fan, but it kept me awake