IBM DS4800 - Replacing the Interconnect-Battery Unit; Replacing the Controllers

3. Replace the controllers at the back of the DS4800. Figure 23 shows the location
of the controllers and the controller levers. Ensure that controller A is returned to
the upper slot and that controller B is returned to the lower slot.
Note:
Controller B is installed in an orientation that is rotated 180 degrees from
that of controller A.
4. Attach the DS4800 front bezel. Install the front bezel by aligning the pins on the
storage subsystem chassis with the spring-steel retainers on the cover, and then
Levers
in released
position
Interconnect-
battery unit
ds48017
Figure 22. Replacing the interconnect-battery unit
RAID
controller A
Levers
in released position
RAID
controller B
ds48028
Figure 23. Replacing the controllers
44 IBM System Storage DS4800 Storage Subsystem: Installation, User’s, and Maintenance Guide