Hey guys, My customer now has a bunch-o-blades deployed and has come up witht his question:
We just recently installed a new M1000e chassis which has the latest CMC firmware (1.10). We have noticed that fans 7,8, and 9 run at 12000RPM even when the other fans are only at 4000RPM. We see this even when the all the blades in the system have been powered down. The ambient temperature is read as 19 degrees C.
Our other M1000e chassis which is consuming more watts and has a previous version of the CMC firmware (1.01) does not exhibit this behavior.
Any ideas? Is this expected? Is this a firmware issue?
Here's screenshot taken right now from our chassis with 1.10 firmware and fully loaded with 14 x M605's and 2 x M600's at 23 degrees C ambient temp. Not anywhere close to the 12000RPM your customer is witnessing.
Are the iDRACs on all the servers up to date as well ?
Have you tried moving the fans around and see if this follows the fan or the slot the fan is in ?
I would say not expected, check the things above and lets see if we can nail it down.
Welcome to the site, we were beginning to think Brian just had imaginary friends :-)
I'm not sure if the power supplies change any of the fan algorithms with respect to the number. I'll have to test on our chassis on Monday. I can also point the thermal engineers at this thread (the one's that write the fan code) and see if they have input.
I have updated the Firmware on the iDRACs (all 1.11) and BIOS (all 2.04) on the all servers in 2 of our enclosures, rebooted the CMC and still see the same thing. Our other two enclosures came preloaded with the most recent versions and it has always had fans 7-9 running fast. So the latest iDRAC firmware and server BIOS doesn't seem to be a solution.
Example: Fan-1 4923 RPM Fan-2 4922 RPM Fan-3 4883 RPM Fan-4 4923 RPM Fan-5 4775 RPM Fan-6 4796 RPM Fan-7 12581 RPM Fan-8 12634 RPM Fan-9 12509 RPM Ambient_Temp 21C CMC reports health as all good and I can personally verify the fans are running fast and loud