Let's look at a simple example of how you can service a DS6000 system. An administrator notices that a light path indicator is lit on the front panel, letting her know to check the back of the system.
She looks at the indicators on the back of the unit to isolate a power supply failure.
She then removes the failed component and replaces it.
and checks to confirm that the light path indicator is no longer lit, indicating that the new power supply is functioning normally.