Figure 21 Installing the right rail to the rear channel
5. Install the right rail to the front channel.
Refer to the following figure while performing task in this step.
a. Align the front of the right rail so that it is level and the front rail pins are aligned with the
middle holes of the bottom two U spaces of the 4U space.
b. Pull the rail forward, with the adapters aligned with the middle holes of the bottom two U
spaces of the 4U space.
An audible click indicates that the connection is secure.
Figure 22
Installing the right rail to the front channel
6. Install the left rail by repeating step 3 or step 4.
7. On both left and right rail assemblies, install a single long screw between the rail posts in the
upper screw hole to secure the rails as follows:
a. For Dell EMC racks or racks that do not have threaded holes, insert a single M5 screw
into the larger of the two screw holes.
Install the Disk Shelves in the Rack
Dell EMC PowerProtect DD9900 System Installation Guide 37
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