Data Domain DD9800 System Installation and Storage Expansion Guide

Installing the rails using the adapter hardware

1. Attach a long bracket to the front of each rail using four M5 screws into the first (top), second, fourth, and sixth holes.
   
2. Attach a short bracket to the rear of each rail using two M5 screws into the top and bottom holes.
   
3. (M6 or 12/24 tapped holes racks only) Attach clip nuts.
   Slide two clip nuts onto the front bracket assembly at the top and bottom positions.
4. Determine the vertical position in the rack at each rack post where the rails are to be installed.
   The top-most mounting hole for a particular rack unit (RU) mounting position is typically identified by a mark or hole. Racks may also be screen-printed to show the positions of the rack units.

   NOTE Two people may be required to attach the rail/bracket assembly to the rack.
5. Attach the first rail to the rack as follows:
   1. Hold the rail against the inside of the rack, with the rear bracket aligned with the rear of the rack.
   2. Pull the front of the rail until it is aligned with the inside of the rack front.
   3. Attach the front of the rail/bracket assembly to the front of the rack.
   For M6 or 12/24 tapped rack holes: insert M5 screws through the rack hole positions as shown in Figure 1. Secure the screws using the furnished nuts.
   For M5 or 10/32 tapped rack holes: partially screw in the screws into the rack hole positions as shown in Figure 1. Slide the rail kit over the exposed threads. These threads temporarily hold the rail kit in position while the kit length is being adjusted. Once the rail kit is set to the correct length, thread the mating nuts onto the exposed screws and tighten with a wrench.

   

   NOTE To secure the rail adapter hardware nuts, you may need to use the supplied wrench or pliers to tighten the nuts.
6. Repeat step 5 for the second rail.
7. After installing both rails, ensure that they are level with one another.