HP Tc2120 HP 2100S SCSI RAID - User Guide (337208-001) - Page 18
Cache Memory Module, Adapted SCSI RAID Controller LEDs, LED Display During Power-Up
UPC - 808736945332
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About Your New Controller Cache Memory Module SDRAM memory provides 32 MB, 64 MB, or 128 MB of high-speed disk cache for Adaptec SCSI RAID controllers. If ECC memory is installed, the cache is protected by ECC, which automatically repairs errors in the data. The green ECC Enabled LED is lit when ECC memory is installed. For the location of this LED, refer to "Board Layout" in this chapter. Adapted SCSI RAID Controller LEDs Adaptec SCSI RAID controllers provide nine LEDs that let you visually monitor controller activity. Several different controller states are indicated by the LED as outlined in the following sections. Two additional LEDs indicate the status of the cache memory on the controller. For the location of the LEDs on your controller, refer to "Board Layout" in this chapter. LED Display During Power-Up During its power-up sequence, the controller passes through the following states in sequence, as indicated by the LEDs: NOTE: The address translation unit (ATU), PCI bridge, and cache module (if installed) must be configured and enabled before the I2O initialization can be completed. If any one of these components are not configured or become disabled during the Fast Idle phase, the pattern will return to the respective wait pattern for the affected component. 2-6 HP 2100S SCSI RAID Controller User Guide