IBM 9009-22A Manual page 72

Figure 53. Disconnecting the signal cable and power cable
6. Ensure that all cables are carefully positioned out of the way, such that the NVMe drive backplane can
be easily lifted and removed.
7. Unscrew the three captive thumbscrews (A) of the NVMe drive backplane (B) as shown in the following
figure until fully loose.
If needed, use a Phillips screwdriver to loosen the screws.
58 Power Systems: Power Systems: Drive backplane