Z440 fan speed

[s3g4]

Hi,

I have set up a little server with a HP Z440. After installing a SAS HBA the fans seem blast at 100% all the time (with CPU cores bearly reaching 45°C). 

Do you have any advice how to controll the fan speed?

[BambiBoomZ]

S3g4,

1.  Check in BIOS/setup the Advanced > Thermals settings. In the z620 BIOS, this is a series of astericks  that advance the fan curve.  Check that the setting is the lowest- one asterick.

Without Linux experience, any comments will be semi-wild speculation, but it seems a valid question at least as to whether that particular distro used in servers may- or may not contain internal PWM fan controls that override the system BIOS and/or OS-based ocntrols. Servers are typically designed as very high- 70+ CFM  air flow environments- 3000RPM fans containing passive-cooling CPU and GPU components. And, my outsider's understanding is that there are complex, unpredictable OS / driver to hardware interactions.

2. Is it possible that Ubuntu when detecting the HBA is configuring the maximum fan speed assuming a server environment?

3.  Does Ubuntu LTS have an internal OS-based to PWM controller controller?

4. Consider reinstalling the HBA and testing  without a RAID configuration. that could help isolate the problem. Could there  be a hardware driver conflict?

I hope others here with Linux experience will comment, but also consider an inquiry to Wendell at LEVELONETECHS - a genuine Linux master, and/or the site's Linux forum:

https://forum.level1techs.com/c/software/linux/27

BambiBoomZ

HP z620_2 (2017) (R9): Xeon E5-1650 v2 (6C@ 4.4GHz) / z420 Liquid Cooling / 64GB (HP/Samsung 8X 8GB DDR3-1866 ECC registered) /GTX 1070 Ti 8GB / Samsung SM951 M.2 512GB AHCI + Samsung 970 EVO M.2 NVMe 500GB + HP/HGST Enterprise 6TB / Focusrite Scarlett 2i4 sound interface + 2X Mackie MR824 / 825W PSU / Windows 7 Prof.’l 64-bit (HP OEM) > 2X Dell Ultrasharp U2715H (2560 X 1440)

[ Passmark Rating = 6148 / CPU rating = 15952 / 2D = 787 / 3D= 13077 / Mem = 3045 / Disk = 15506 / Single Thread Mark = 2425 [5.20.21]

HP z420_3: (2015) (R12) Xeon E5-1650 v2 (6C@ 4.3GHz) / z420 Liquid cooling / 64GB (HP/Samsung 8X 8GB DDR3-1866 ECC registered) / NVIDIA GeForce GTX 1060 6GB/ Samsung SM951 M.2 256GB AHCI + Samsung 860 EVO 500GB + HGST 7K6000 4TB / ASUS Essence STX + Logitech z2300 2.1 / 600W PSU > Windows 7 Professional 64-bit (HP OEM ) > Samsung 40" 4K

[Passmark System Rating: = 5947 / CPU = 15268 / 2D = 773 / 3D = 11025 / Mem = 2931 Disk = 15530 /Single Thread Mark = 2383 [5.3.21]

[s3g4]

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Thanks for your advice. My short term solution is: CPU fan bearing seems to be faulty, out it went and I replaced it with the case fan (plus notua low noise adapter). Now the heatsink is backwards bc the cables are short. 

Well at least it is running half decent now.