Raptor Computing Systems Hardware > Blackbird
Heatsink dual fan configuration
MPC7500:
@mx08 or @ shawnanastasio:
In the next few days would like to update to bangBMC. Is the procedure identical to Updating the BMC firmware?
Or how do I proceed?
And is there a comparison table (features/ pros and cons) somewhere between OpenBMC and bangBMC?
xilinder:
--- Quote from: MPC7500 on December 11, 2019, 04:20:35 am ---On my 2U HS the CPU is running a little bit hot.
--- End quote ---
Could you please post a picture of your 2U heat sink setup?
Never seen one. :-[
shawnanastasio:
--- Quote from: MPC7500 on January 22, 2020, 05:30:49 pm ---@mx08 or @ shawnanastasio:
In the next few days would like to update to bangBMC. Is the procedure identical to Updating the BMC firmware?
Or how do I proceed?
And is there a comparison table (features/ pros and cons) somewhere between OpenBMC and bangBMC?
--- End quote ---
bangBMC is currently in pretty early stages and I wouldn't really recommend it unless you have flashing hardware and BMC serial access to recover in case something goes wrong.
As far as a comparison table, I don't think such a thing exists, but I should talk to bangBMC's creator (dormito on IRC) about creating one.
The TL;DR is that it's a super simple distribution that just contains the bare minimum for booting the P9 cores and nothing else. (no systemd, no dbus, no web servers, no python, no C++ runtime)
This makes it well suited for desktop machines where you don't necessarily need/want all the features oBMC provides and would prefer a minimal (and much faster!) replacement.
The fan daemon I wrote is pretty bare-bones and should be much easier to configure than the oBMC one.
The current algorithm works by just reading the current maximum temperature per-zone and looking up a corresponding fan speed in a table, so changing it should be pretty straightforward:
https://git.anastas.io/shawnanastasio/op-fan-daemon/src/branch/master/include/curve.h
Eventually I'll add config file support and a fancier PID-based control algorithm. Once this is done, Raptor has expressed interest in potentially shipping it along with bangBMC as an option for some of their machines. ;D
MPC7500:
Hi,
I thought shawnanastasio / dormito are the same person. Sorry about that.
In the next couple days I will do some small modifications on my setup. Also I will put in an ASSMANN AK-610300-003-E. Then I have a serial connection. What just comes to my mind, wouldn't it be better to buy another chip and program bangBMC on it? Then you can easily change the chips if needed. I have a Bus Pirate, too.
--- Quote from: xilinder on January 23, 2020, 06:46:23 am ---Could you please post a picture of your 2U heat sink setup?
Never seen one. :-[
--- End quote ---
At the end, it's a 3U HSF, little bit smaller and without fan.
MPC7500:
@xilinder: Pictures
Not beautiful, but rare (picture quality) ;)
Edit: Here is by far a better picture.
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