IBM DCS3860, Installation, User'S, And Maintenance Manual

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c. Power off the DCS3860 enclosure with the controllers CRUs/FRU first.
Then, power off the drive expansion enclosures.
2.
Remove the bezel of the DCS3860 enclosure with the enclosure chassis you
want to replace.
3. Label the drive drawers of the enclosure.
4. Label and remove the fan assembly modules.
a. At the rear of the storage expansion enclosure, remove the fan assembly
(see Figure 61) by pressing on the locking tab holding the fan assembly
handle in place; then, pull the fan assembly towards you.
b. Use the fan assembly handle to pull the fan assembly out of the enclosure.
5. Unplug the power cord, label the power supply modules, remove them by
pulling outward the latches together, and pull the levers open to release the
power supply from the enclosure. Then, slowly pull the levers to slide the
power supply out of the power supply bay. The latches are the orange colored
tabs on the levers.
6. Label all connections to the controller or ESM modules, disconnect all
connections, and squeeze to remove the controller or ESM modules.
7. Remove the five sets of cable chains that connect the disk drawers to the
midplane in the DCS3860 enclosure. Complete the following steps to remove
each set of cable chains:
Handle
Cam
Locking tab
Cam
Guide slot
Figure 61. Removing a fan assembly
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IBM System Storage DCS3860 Storage System: Installation, User's, and Maintenance Guide