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Power

4.5 Power Supply Replacement

The input power for each ac and dc power supply is controlled by a switch on the

cable distribution unit. Turning this switch off removes power from all power

supplies in the cabinet. To remove power from a single power supply, you simply

disconnect the power cable from that power supply.

The three methods for replacing power units are described in Section 3.1.

Digital recommends that you use the warm-swap method whenever operational

requirements permit.

4.5.1 Replacing a Shelf Power Supply

WARNING

Always use both hands when removing or replacing an SBB in order to

fully support its weight.

Complete the following procedure to replace either a shelf power supply or a

redundant power supply:

1. Remove the input power cable from the supply.

2. Press the two mounting tabs to release the unit, and slide the unit out of the

shelf, as shown in Figure 4–3.

3. Insert the replacement unit into the guide slots and push it in until the tabs

lock in place.

4. Connect the input power cord.

5. Observe the LEDs and make sure the supply is functioning properly (refer to

Table 2–2).

6. Sequentially place the storage devices online. Observe the LEDs on both the

power supply and the storage device for normal operation indications.

Figure 4–3 Removing an SBB from a Shelf

CXO-3611B-PH

Power 4–5

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Digital Equipment Corporation Storage Works Guía de usuario Pagina 41