Fujitsu PRIMERGY TX2550 M5 Upgrade And Maintenance Manual page 259

Hard disk drive (HDD) / solid state disk (SSD)
Removing the SAS expander board
▶ Remove the SAS expander board holder, see
"Removing the SAS
expander board holder" on page 312.
Figure 155: Removing the screws of the SAS expander board
▶ Remove the five screws (see circles).
▶ Remove the SAS expander board from the SAS expander board holder.
TX2550 M5 Upgrade and Maintenance Manual 259