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 so...