Check out part #2 of the MSA Best Practice video series. Part #2 focuses on updating Expansion Module Firmware.
https://www.youtube.com/watch?v=_a-FaQcWhBc&feature=youtu.be
Remeber to maximize your MSA availability, it is important to keep the firmware current. Make sure to visit https://www.hpe.com/storage/MSAFirmware
Stay tuned for Part #3 which will cover updating MSA drive firmware.
Cheers!
/Kipp