Grzery

The system has been stable for a month. I did not replace hard drives. The controller (420) temperature is 52C (was 80-83C) at 17C ambient temperature. I achieved the above results thanks to: 1. Installed a tunnel with 2 fans (similar to those used in graphics cards). 2. Replace the paste under the controller heat sink. The original did not give good thermal coupling with the chip. Greetings to all, I wish you good health (your systems).

I know, I know, but we have similar problems 🙂

Thanks for the suggestions Unfortunately, I do not have (yet) an HBA. There are 420 working on the server (gen8). The installed operating system is Windows Server 2016 (Hyper-V) and must remain so. There are no problems in ILO4. Only after a failure the system signals an error identical to that in the post 1812, April 30, 2019. Three SSDs 512 GB (RAID 5) and 8 x 4 TB are installed. RAID 6, 4TB drives are from different manufacturers (Seagete, WD). This is probably the cause of my problems. I recommend the article http://dascomputerconsultants.com/HPCompaqServerDrives.htm Its author has collected some interesting and very useful information about problems with "foreign" disks on HP servers.

Bad news: the fans spin at 100% again, just like before

Welcome I had very similar problems. It was solved by establishing a tunnel with an additional fan (3d printing) on the controller. fans: 35-36% , Controller temperature 80-83C I haven't checked it yet but it's possible that our problems are caused by bad thermal contact between the heat sink and the chip. https://www.thingiverse.com/thing:4070343 Good luck :)