Lenovo ThinkSystem SR950 Setup Manual page 335

The power-control button on the device and the power switch on the power supply do not turn off the
electrical current supplied to the device. The device also might have more than one power cord. To
remove all electrical current from the device, ensure that all power cords are disconnected from the
power source.
"
CAUTION:
Make sure that all server power cords are disconnected from their power sources before performing
this procedure.
Complete the following steps to install a hard disk drive backplane in the upper compute tray or optional
storage tray.
Watch the procedure. A video of the replacement process is available:
•
YouTube
•
Youku
Step 1. Connect the power cable to the backplane. If this cable is connected to the storage interposer, you
might find it easier to disconnect it from the storage interposer and then reconnect it to the storage
interposer after the backplane is installed. See "Cable routing for drives" on page 40.
Step 2. Install the hard disk drive backplane.
Note: Existing cables might need to be removed from their retaining clips or moved to the side to
install the backplane.
Figure 95. Hard disk drive backplane (upper) installation
Align the backplane with its location in the tray; then, insert the backplane and push it down until it
is fully seated.
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Appendix B. Component reference
331