Western Digital Ultrastar Data60 User Manual page 97

User Guide
Step 14 : Install the CMA(s).
a. Orient the CMA so that the elbow is on the left hand side.
b. Attach all three of the connectors to the brackets on the rails. There should be one at the
elbow side and two at the other end.
c. Slowly slide the enclosure forward to ensure the arm is operating properly, then slide it
back into the rack.
a. Repeat these steps to install the upper arm with the elbow facing to the right.
Step 15 : Cable the CMA(s).
a. Unlatch the elbow side of the arm(s) by pressing the blue button labeled "push," and then
swing the arm(s) open.
b. Gather the SAS, power, and Ethernet cables for installation. Before cabling, note the
following routing patterns for best results:
Note: The CMA has two arms, labeled "upper" and "lower." The lower arm
should have the elbow on the left side and be installed first; the upper arm
should have the elbow on the right side and be installed last.
Figure 80: Lower CMA Orientation
Note: Route the cables supported by the lower arm to IOM A (left
hand side looking at the rear). Second, route the cables supported
by the upper arm to IOM B (right hand side looking at the rear) in
a "criss-cross" pattern. See the
Routing (page 157)
Special Considerations for Cable
for more information.
4. Part Replacement
4.7 CMA Replacement
87