IBM FAStT500 User Guide - Page 36

Power Power supply Controller fan Controller Fast write cache Fault Power Heartbeat Fault-B Full Charge-B Figure 9. Indicator lights (front) Full Charge-A Fault-A Table 2: Indicator lights (front) Indicator light Power Fault Heartbeat Status (eight lights including Heartbeat) Color Normal operation Problem indicator Possible conditions indicated by the problem indicator1 Component: controller CRU Green On Off • No power to controller unit • No power to storage subsystem • Cables are loose or the switches are off • Power supply has failed, is missing, or is not fully seated • Overtemperature condition Amber Off Green Blinking2 On Not blinking2 Controller failure; controller fault condition No controller activity Green Various patterns depending on the condition Various patterns depending on the condition If the second, third, sixth, and seventh lights are on or if all eight lights are on, there is a memory fault indicating that the controller CRU has failed. 16 IBM FAStT500 RAID Controller Enclosure Unit User's Guide