IBM DS3950, Installation, User'S, And Maintenance Manual, Page: 72 / 252

2. As you slide the power supply and fan unit into the empty slot, make sure the
guide pins on the side of the power supply and fan unit fit into the notches
along the sides of the power supply and fan unit bay. After the guide pins fit
into the notches and power supply and fan unit fits snugly into the slot, push
the lever upward or downward 90° depending on whether the power supply
fan is inserted in the left or right bay to fully latch it into place. Push the front
of the power supply and fan unit in gently to make sure that it is fully seated.
3. Repeat step 1 on page 43 and step 2 to replace the second power supply and
fan unit.
Replacing an E-DDM
Complete the following steps to replace the hot-swap E-DDMs that you removed
before the installation.
Attention: After you remove an E-DDM CRU, wait 70 seconds before replacing
or reseating the E-DDM CRU to allow the E-DDM to properly spin down. Failure
to do so might cause undesired events.
Note: Use Table 26 on page 170 to verify the proper replacement locations of your
E-DDMs.
1. Lift up on the handle and gently push the E-DDM CRU into the empty bay
until the hinge of the tray handle latches beneath the storage subsystem bezel,
as shown in Figure 22.
2. Push the tray handle down until the latch clicks into place.
3. Repeat step 1 and step 2 to replace additional E-DDMs.
Latch
Figure 22. Replacing an E-DDM
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IBM System Storage DS3950 Storage Subsystem: Installation, User’s, and Maintenance Guide