80 PERC 3/ QC Feat uresw w w . d e l l . c o m | s u p p o r t . d e l l . c o m PERC 3/QC BIOSThe BIOS resides on a 1 MB × 8 flash ROM for easy upgrade. The PERC3/QC BIOS supports INT 13h calls to boot DOS without special software ordevice drivers. The PERC 3/QC BIOS provides an extensive setup utilitythat can be accessed by pressing at BIOS initialization.PERC 3 BIOS Configuration Utility is described in Chapter 11"Troubleshooting."Onboard SpeakerThe PERC 3/QC controller has an onboard tone generator for audiblewarnings when system errors occur. Audible warnings can be generatedthrough this speaker. The audible warnings are listed in Chapter 13.Serial PortPERC 3/QC includes a 9-pin RS232C-compatible serial port connector.This is for manufacturing use only.SCSI BusPERC 3/QC has four Wide 160M SCSI channels that support both LVDand single-ended devices with active termination. Synchronous andasynchronous devices are supported. PERC 3/QC provides automatictermination disable by using cable detection. The SCSI channel supportsup to 15 wide or seven non-wide SCSI devices at speeds up to 160 MB/s.SCSI ConnectorsPERC 3/QC has two types of SCSI connectors:• Two 68-pin high density internal connectors• Four 68-pin external ultra-high-density connectorsOnly one connector type can be used for the SCSI channel at any one time.SCSI TerminationPERC 3/QC uses active termination on the SCSI bus conforming to SCSI-2and SCSI-3 specifications. Termination enable/disable is automatic throughcable detection.
