HP 3PAR InForm OS 3.1.1 Messages and Operators Guide

Battery Backup Unit LEDs
Depending on the configuration, storage systems with HP 3PAR cabinets include one or more
battery trays that hold up to four BBUs each. BBUs supply power to write the cache memory to the
drive inside the node in the event of a power failure.
BBUs contain two batteries, labeled battery a and battery b, and include the following LEDs
(Figure 54 (page 55)):
Figure 54 BBU LEDs (Magnetek)
Table 18 BBU LED Displays
IndicatesAppearanceLED
Battery is charged.Solid green lightBattery A, B
Battery is undergoing a test.Flashing green light
Battery error.Solid amber
BBUs or power supply is turned off.No light
Power Distribution Unit Lamps
T-Class storage systems include four PDUs that contain two power bank lamps (Figure 55 (page 55)):
Figure 55 Power Distribution Unit Lamps
A blue illuminated lamp indicates that power is being supplied to a power bank. When the blue
lamp is not illuminated, the power bank is not receiving AC input.
Service Processor LEDs
The following describes the LEDs for the Supermicro and the Supermicro II Service Processor LEDs.
Service Processor LEDs 55