Fujitsu PRIMERGY RX4770 M6 Upgrade And Maintenance Manual page 163

Hard disk drive (HDD) / solid state disk (SSD)
Figure 73: Removing the SAS expander board
▶ Loosen the four screws (see circles).
▶ Remove the SAS expander board.
Installing the new SAS expander board
▶ Insert the SAS expander board.
▶ Fasten the four screws (see
Figure 73).
RX4770 M6 Upgrade and Maintenance Manual 163