LSI MegaRaid HBA's, overheating and one ugly hack
Summer is here! Like many others, I have LSI MegaRaid HBA's that I use in desktop machines. These things are great but they tend to overheat and quite a few people have reported high temperature findings (97C reported by the chip when idle'ing in both my Dell T410 and my Dell T5610): $ sudo megaclisas-status -- Controller information -- -- ID | H/W Model | RAM | Temp | Firmware c0 | LSI MegaRAID SAS 9271-8i | 1024MB | 97C | FW: 23.32.0-0009 c1 | LSI MegaRAID SAS 9280-4i4e | 512MB | N/A | FW: 12.15.0-0205 [...] I had never really bothered about the temperature but when I started to rebuild my T410's boot LD (Raid-1) to swap the 2Tb drives with 4Tb drives I had, things started to get complicated quickly. As soon as the mirror started rebuilding, the ROC temp (sitting around 97C) skyrocketted to 102C and soon enough the card shut down itself, dropping off the PCI-E bus and resetting the server. After machine reset, the