Dell Precision Workstation 450 Service Manual

Also see for Precision Workstation 450: System information guide System information guide Setup and quick reference guide Setup and quick reference guide Setup and quick reference guide

Dell Precision Workstation 450 Service Manual Manual pdf 17 page image

Most interface connectors are keyed for correct insertion; that is, a notch or a missing pin on one connector matches a tab or a filled-in hole on the otherconnector. Keyed connectors ensure that the pin-1 wire in the cable (indicated by the colored stripe along one edge of the cable) goes to the pin-1 end of theconnector. The pin-1 end of a connector on a board or a card is usually indicated by a silk-screened "1" printed directly on the board or card.SCSI Device Installation GuidelinesThis section describes how to configure and install SCSI devices in your computer.SCSI ID NumbersInternal SCSI devices must have a unique SCSI ID number from 0 to 15. If you are using the SCSI connector on the system board and a SCSI controller cardinstalled in your computer, you have two separate SCSI buses operating. Each SCSI bus has a set of SCSI ID numbers from 0 to 15.When SCSI devices are shipped from the factory, the default SCSI ID numbers are assigned as follows:SCSI devices installed by Dell are configured correctly during the manufacturing process. You do not need to set the SCSI ID for these SCSI devices.If you attach additional optional SCSI devices, see the documentation for each device for information about setting the appropriate SCSI ID number.Device Termination1 power cable2 power input connector1 interface connector2 colored stripe on cable3 interface cableNOTICE: When you connect an interface cable, do not place the colored stripe away from pin 1 of the connector. Reversing the cable prevents the drivefrom operating and could damage the controller, the drive, or both.System Board Controller Controller CardDevice ID Device IDController 7 Controller 7Boot hard drive 0 Boot hard drive 0CD or DVD drive 5tape or DAT drive 6NOTE: There is no requirement that SCSI ID numbers be assigned sequentially or that devices be attached to the cable in order by ID number. If two ormore devices use the same ID, your computer may hang during POST and in SCSI BIOS.NOTICE: Dell recommends that you use only SCSI cables purchased from Dell. Cables purchased elsewhere are not guaranteed to work with Dellcomputers.