Installing SCSI Hard-Disk Drives 6-1Chapter 6Installing SCSI Hard-Disk DrivesThis chapter describes how to install and configuresmall computer system interface (SCSI) hard-disk drivesin the computer’s six internal drive bays.Dell PowerEdge 4200 systems include a SCSI backplaneboard that greatly simplifies cabling and configurationfor SCSI hard-disk drives. All SCSI identification (ID)numbers and termination for SCSI hard-disk drives areconfigured by the SCSI backplane board, rather than onindividual drives.In the standard PowerEdge 4200 system configuration,the Ultra/Wide SCSI host adapter on the system boardcontrols the SCSI backplane board. When used in combi-nation with an optional PowerEdge Expandable RAIDController host adapter, the SCSI backplane board allowsyou to remove and insert hard-disk drives without shut-ting down the system—an invaluable feature for serversthat contain important data and programs for an entirenetwork of users. You can replace a failed drive withoutforcing all users on the network to log off and losevaluable time and possibly data. See “Removing andInstalling a SCSI Hard-Disk Drive With the System Run-ning” found later in this chapter for details.Figure 6-1 illustrates the internal drive bays and SCSIbackplane board.CAUTION: Removing or installing hard-diskdrives with the system running is not supported forsystems without a Dell PowerEdge Expandable RAIDController host adapter. Removing a drive in this situa-tion will result in a loss of data.
