This thread is meant to replace the now outdated old one about recommended controllers, these are some controllers known to be generally reliable with Unraid:   Note: RAID controllers are not recommended for Unraid, this includes all LSI MegaRAID models, doesn't mean they cannot be used but there could be various issues because of that, like no SMART info and/or temps being displayed, disks not being recognized by Unraid if the controller is replaced with a different model, and in some