Figure 40. Securing the M.2 drives
Attention: Make sure the two nubs on the retainer are in the small holes on the M.2 backplane 
when the retainer is slid forward. 
Slide the retainer forward (toward the connector) until you hear a soft “click” sound.
After installing an M.2 drive option: 
1.  Install the M.2 backplane. See “Install the M.2 backplane” on page 80.
2.  If you have no additional options to install in the I/O tray, install it. See “Install the I/O tray” on page 153.
Note: You will need to configure the M.2 drive to complete the installation. See the information that comes 
with the M.2 drive option for information.
Install a riser
Risers are in the I/O tray that is accessed from the rear of the server.
Install adapters before installing the risers.
Install the riser for slots 1 through 4 (left riser)
The riser for adapter slots 1 through 4 (left riser) is in the I/O tray that is accessed from the rear of the server. 
After installing adapters in the riser, insert the riser in the I/O tray and secure it with two captive screws. 
S002  
CAUTION: 
The power control button on the device and the power switch on the power supply do not turn off the 
electrical current that is 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: 
74
ThinkSystem SR950 Setup Guide