Fujitsu PRIMERGY TX2550 M4 Upgrade And Maintenance Manual page 237

Figure 152: Installing the second 3.5-inch HDD SAS backplane (B)
Ê Ensure that the SAS backplane is properly seated into the bottom rim and
side guide (see arrows).
Ê Ensure that the upper edge of the SAS backplane is flush with the HDD bay
divider wall (see dashed line).
TX2550 M4
Hard disk drive (HDD) / solid state drive (SSD)
Upgrade and Maintenance Manual
237