Hi,
I've been lurking in the wonderful Brocade 10G Switch Thread. I bought an 24 Port PoE Switch and got me 2 Maglev 40mm fans in order to bring the silence. Sadly the fans from time to time spun up because the MGMT Thermal Plane sensor went over 93 °C. After a minute the temperature went down to like 85 °C but it would only take another 10-15 minutes until it reached the threshold again. Even when the fans were on slow speed, I just found them too noisy.
That's why I decided to cut the chassis open. My plan was to just install 2 120mm fans. With the drill I cut two holes in the top. It cost me quite some time and they are not perfectly round as you can see.
The fan connector is always like the power in the middle (red) while Tachometer wire and Ground need to be replaced. If you suspect your fan might not spin fast enough, especially during bootup, you probably forgot about that ^^
Unfortunately there was a problem with my approach. The switch boots up and when it reaches reachability it would just reboot again. I do not know for sure as I'm lacking a fitting console cable but I'm quite sure that there are rpm thresholds in the firmware that will lead to the reboot. The 120 fans only run on like 500 rpm instead of like 3000 for the 40mm. My first thought was to go with faster spinning fans but in the end I decided to close one whole again and just use a combination of 1 x 40mm fan in the back and 1 x 120mm fan on top.
The project was a success. The switch is audible but it's not annoying at all. I'm sitting in the same room like 4m away from it.
The temperatures are really steady now on ~ 71 °C on MGMT Thermal Plane and 37 °C on the Air Outlet.
Hope this is of help to someone else.
I've been lurking in the wonderful Brocade 10G Switch Thread. I bought an 24 Port PoE Switch and got me 2 Maglev 40mm fans in order to bring the silence. Sadly the fans from time to time spun up because the MGMT Thermal Plane sensor went over 93 °C. After a minute the temperature went down to like 85 °C but it would only take another 10-15 minutes until it reached the threshold again. Even when the fans were on slow speed, I just found them too noisy.
That's why I decided to cut the chassis open. My plan was to just install 2 120mm fans. With the drill I cut two holes in the top. It cost me quite some time and they are not perfectly round as you can see.
The fan connector is always like the power in the middle (red) while Tachometer wire and Ground need to be replaced. If you suspect your fan might not spin fast enough, especially during bootup, you probably forgot about that ^^
Unfortunately there was a problem with my approach. The switch boots up and when it reaches reachability it would just reboot again. I do not know for sure as I'm lacking a fitting console cable but I'm quite sure that there are rpm thresholds in the firmware that will lead to the reboot. The 120 fans only run on like 500 rpm instead of like 3000 for the 40mm. My first thought was to go with faster spinning fans but in the end I decided to close one whole again and just use a combination of 1 x 40mm fan in the back and 1 x 120mm fan on top.
The project was a success. The switch is audible but it's not annoying at all. I'm sitting in the same room like 4m away from it.
The temperatures are really steady now on ~ 71 °C on MGMT Thermal Plane and 37 °C on the Air Outlet.
Code:
The stack unit 1 chassis info:
Power supply 1 (AC - PoE) present, status ok
Power supply 2 not present
Fan 1 failed
Fan 2 ok, speed (auto): [[1]]<->2
Fan controlled temperature:
Rule 1/2 (MGMT THERMAL PLANE): 71.3 deg-C
Rule 2/2 (AIR OUTLET NEAR PSU): 38.0 deg-C
Fan speed switching temperature thresholds:
Rule 1/2 (MGMT THERMAL PLANE):
Speed 1: NM<-----> 93 deg-C
Speed 2: 82<----->105 deg-C (shutdown)
Rule 2/2 (AIR OUTLET NEAR PSU):
Speed 1: NM<-----> 58 deg-C
Speed 2: 49<----->105 deg-C (shutdown)
Fan 1 Air Flow Direction: Front to Back
Fan 2 Air Flow Direction: Front to Back
Slot 1 Current Temperature: 71.3 deg-C (Sensor 1), 38.0 deg-C (Sensor 2)
Slot 2 Current Temperature: NA
Warning level.......: 92.0 deg-C
Shutdown level......: 105.0 deg-C
Fan 1 Speed at 546 RPM.
Fan 2 Speed at 2830 RPM.
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