Raptor Computing Systems Hardware > Blackbird

Heatsink dual fan configuration

(1/5) > >>

MPC7500:
Hello,

I would like to know, if the dual fan configuration works in the meantime on the Blackbird? Was there any progress or any kind of update?

ClassicHasClass:
What do you mean, "dual fan configuration"? My Blackbird has four fans, two on each fan header (CPU and case) using a splitter. I can observe both pairs operating independently.

Or are you referring to some sort of dual HSF assembly?

MPC7500:
Yes, CPU dual fan config. On the Talos-II it works, on the Blackbird not:
https://wiki.raptorcs.com/wiki/Dual_92mm_fan_CPU

On my 2U HS the CPU is running a little bit hot.

mx08:
I think that depends on the fans you are using in combination with the firmware.

AFAIK the reason the dual fan mod using two Noctua NF-A9 PWM fans doesn't work on the Blackbird is that it uses a newer firmware than the Talos II. See also the point:

--- Quote ---note, on firmware 04-16-2019 dual-fan mod no longer works reliably, as new less agressive profiles spin down fans below minimum speed and opembmc print a lot of warnings about CPU0 fan being inoperational. fan still spins, but fails every 10 seconds, spins up and fails again endlessly. refer to Fan Tuning page for a fix.
--- End quote ---
from https://wiki.raptorcs.com/wiki/Dual_92mm_fan_CPU

As explained in the Fan Tuning page, you can adjust the parameters in OpenBMC to make it work.

I suppose you could also use !BMC (https://git.anastas.io/dormito/br-blackbird-external) in place of OpenBMC, where you can configure the fan settings more easily (AFAIK you need to recompile it to update fan the settings, but compilation takes less time and the fan daemon infrastructure is simpler).

MPC7500:
Cool, thanks. I didn't read the thing about the fix. I will give bangBMC also a try. It's quite possible that I'll get back to you, then.

Navigation

[0] Message Index

[#] Next page