Step 2.  Remove the rear drive cage. 
a.  Twist and pull out the blue plungers.
b.  Slide the drive cage towards the rear of the chassis to release it.
Figure 257. Removing the 4 x 2.5-inch rear drive cage
Figure 258. Removing the 8 x 2.5-inch rear drive cage
After you finish
Remove the backplane from the drive cage. See “Remove the rear 2.5-inch drive backplane” on page 330.
Remove the rear 2.5-inch drive backplane
Use this information to remove the rear 2.5-inch 4-bay or 8-bay drive backplane.
About this task
Attention: 
•  Read “Installation Guidelines” on page 185 to ensure that you work safely.
•  Power off the server and disconnect all power cords for this task.
•  Prevent exposure to static electricity, which might lead to system halt and loss of data, by keeping static- 
sensitive components in their static-protective packages until installation, and handling these devices with 
an electrostatic-discharge wrist strap or other grounding system.
A video for this task is available at:  
330
ThinkSystem SR650 V2Maintenance Manual