Fujitsu PRIMERGY TX2550 M4 Upgrade And Maintenance Manual page 201

Hard disk drive (HDD) / solid state drive (SSD)
Figure 119: Removing a SAS backplane - example SAS backplane 3 (A)
Ê Remove the four (SAS backplane 2 and 4) or two screws (SAS backplane 1
and 3).
Figure 120: Removing a SAS backplane - example SAS backplane 3 (B)
Ê Take out the SAS backplane in a slight angle.
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TX2550 M4 Upgrade and Maintenance Manual