Western Digital Ultrastar Serv60+8 User Manual page 202

User Guide
c) The arm should be extended away from the enclosure as shown in the following example.
Figure 250: CMAs in service position (Cables not shown)
2. Power down the Enclosure.
a) Locate the redundant PSUs at the rear of the enclosure.
b) Detach the cable retention clip from both power cords.
Figure 251: Cable Retention Mechanism
c) Power down the enclosure by disconnecting both power cables, one from each PSU.
3. Uncable the CMA.
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4 Part Replacement
4.13 Rails Replacement