7. Repeat steps 5 on page 50 through 6 on page 51 to install the opposite rail.
8. Install the expansion enclosure in the rack, as described in “Installing or
replacing an expansion enclosure in a rack: 2077-92F.”
Installing or replacing an expansion enclosure in a rack:
2077-92F
Use the following procedure to place the 2077-92F expansion controller in a rack
during the installation process. To complete some service tasks, you might also
need to slide the enclosure back in to the rack.
Figure 37. Example of the required rack space
52 Storwize V5000 Gen2: Quick Installation Guide