Dell EMC PowerEdge M640 Installation And Service Manual page 30

NOTE: You cannot disconnect the drive backplane cable from the system board connector, until you remove the drive
cage.
Figure 23. Removing the drive backplane
NOTE: If your system supports a SAS/PCIe backplane, then you must also loosen two additional retention screws that
connect the storage controller cable connector to the system board connector.
2. Remove the drive cage.
3. Using the Phillips #2 screwdriver, loosen the retention screws securing the drive backplane cable connector to the system
board connector.
4. Lift the drive backplane away from the system.
30 Installing and removing system components