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5. Continue with one of the following actions:
v If you did remove the DS4700 Express CRUs before installation (as
described in “Removing the CRUs” on page 40), continue with “Replacing the
components.”
v If you did not remove the DS4700 Express CRUs before installation, continue
with Chapter 3, “Cabling the storage subsystem,” on page 55.
Replacing the components
If you removed components from the DS4700 Express Storage Subsystem before
you installed it into a rack cabinet, use the following procedures to replace the
components in the DS4700 Express after it is installed successfully in a rack
cabinet.
Replacing a controller
Complete the following steps to replace the controller that you removed before the
installation:
Attention: After you remove an controller, wait 70 seconds before reseating or
replacing the controller. Failure to do so may cause undesired events. The left and
right controllers are seated in the DS4700 Express chassis in opposite orientations.
If you cannot fully insert the controller into the controller bay, flip it 180° and reinsert
it.
1. Slide one controller into the empty slot in the storage subsystem. Be sure that
the lever is pulled straight out as you slide the controller in, as shown in
Figure 27 on page 49.
Figure 26. Securing the DS4700 Express to the rack cabinet
48 IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide