Have the strange behaviour of unplugging and pluging back a disk from an array doesn't make the controller rebuild the array with that disk. (Force rebuild instructions works ok 👍 )
To get smartmontools / smartctl working on the drives , I only need "/dev/sda -d megaraid,X", not "/dev/sda -d sat+megaraid,X"
Two small details with this MegaRAID SAS board
More info about the RAID controller :
lspci :
megacli :