B-3Controller LEDsWhen the power-up sequence is complete, viewing the LEDs canhelp you determine the operating status of the controller. These LEDpatterns are also useful for troubleshooting. Refer to Appendix C formore information on interpreting LED patterns.Cache Status LEDsCache failure information is recorded in the controller error log andcan be viewed using the Event Log window in Storage Manager.Cache Status LEDs – Adaptec 2400A/3200S/3400S OnlyThe following LEDs on the Adaptec RAID controller indicate thestatus of the onboard cache RAM: ECCEN (ECC Enable)—Lit (green) when the installed cachemodule has ECC. ECCERR (ECC Error)—Lit (red) when a correctable ornoncorrectable error has been detected in a cache memorymodule. After an error has been corrected (assuming the errorLED Function1 Indicates that controller is working and interrupts are enabled.During controller activity, this LED flashes four times persecond.2 Indicates the occurrence of a nonmaskable interrupt (NMI) tothe I/O processor on the controller.3 Indicates the controller’s internal operating system is in its idleloop.4 Indicates that the controller’s internal operating system isprocessing an interrupt.5 Reserved for future use.6 Indicates that the cache controller is using Direct MemoryAccess (DMA) to perform a data transfer.7 Indicates the controller is generating parity information for aRAID 5 array (hardware XOR).8 Indicates that there is a command on the peripheral bus.IRQ Indicates the controller activated an interrupt on the host PCIbus.
