Replacing a power supply: 2145-DH8

You can replace either of the two 750 watt hot-swap redundant power supplies in the SAN Volume Controller 2145-DH8 node. These redundant power supplies operate in parallel; one continues to provide power to the node if the other fails.

Before you begin

DANGER

Multiple power cords. The product might be equipped with multiple power cords. To remove all hazardous voltages, disconnect all power cords. (L003)

Ensure that you are aware of the procedures for handling static-sensitive devices before you replace the power supply.

About this task

Important: You can hot swap the power supply. However, using MAP 5350: Powering off a node to power off the node avoids risking an abrupt power failure on the node, which avoids the possible corruption of data. This procedure assumes that you turned off the node by using MAP 5350. Or, that if you did not turn off the node, you used MAP 5350 to ensure that the data is mirrored and synchronized, and that there are no dependent volumes. See MAP 5350.

If you must remove and replace power supply 2, the following information applies to your service action.

Attention: To avoid losing state and data from the node, use the satask startservice command to put the node into service state so that it no longer processes I/O. Then you can remove and replace the top power supply unit (PSU 2). This precaution is due to a limitation in the power-supply configuration. Once the service action is complete, run the satask stopservice command to let the node rejoin the system.

Complete the following steps to replace the SAN Volume Controller 2145-DH8 power supply.

Procedure

Read the safety information.
Grasp the handle on the rear of the power supply, as shown in Figure 1, and slide the power supply forward fully into the node until it clicks in place. Verify that the power cord connects firmly into the power-supply connector.
Figure 1. Replacing the SAN Volume Controller 2145-DH8 power supply
- 1 Power supply 2
- 2 Power-supply release tab
- 3 Power-supply handle
- 4 Power supply 1
If necessary, turn on the node.
To the left of the power-cord connector on each power supply, verify that the ac power LED ( 1 in Figure 2) and the dc power LED ( 2 ) are lit.
- Green power LEDs indicate that the power supply is operating correctly.
- An amber power-supply error LED ( 3 ) indicates a power-supply error.
Figure 2. SAN Volume Controller 2145-DH8 AC, DC, and power-error LEDs
If you replaced power supply 2, use the satask stopservice command to let the node rejoin the system and resume I/O.