Installing Drives in the Internal Bays 10-1Chapter 10Installing Drives in the Internal BaysThis chapter describes how to install and configuresmall computer system interface (SCSI) hard-disk drivesin the computer’s six internal drive bays. (See Chapter 9,“Installing Drives in the External Bays,” for informationon installing SCSI CD-ROM drives and tape drives in theexternal drive bays.)Dell PowerEdge 4200 systems include a SCSI backplaneboard, which greatly simplifies cabling and configurationfor SCSI hard-disk drives. All SCSI identification (ID)and termination for SCSI hard-disk drives are configuredby the SCSI backplane board, rather than on individualdrives.In the standard Dell PowerEdge 4200 system configura-tion, the Ultra/Wide SCSI host adapter on the systemboard controls the SCSI backplane board. When used incombination with an optional PowerEdge ExpandableRAID Controller host adapter card, the SCSI backplaneboard allows you to remove and insert hard-disk driveswithout shutting down the system—an invaluable featurefor servers that contain important data and programs foran entire network of users. You can replace a failed drivewithout forcing all users on the network to log off andlose valuable time and possibly data. See “Removing andInserting a SCSI Hard-Disk Drive With the System Run-ning,” found later in this chapter, for details.Figure 10-1 illustrates the internal drive bays, SCSI back-plane board, and the Ultra/Wide SCSI cable. The Ultra/Wide SCSI cable has two connectors:• The connector at one end attaches to the SCSI hostadapter connector labeled “BACKPLANE SCSI1”on the system board or to an optional SCSI hostadapter card such as the PowerEdge ExpandableRAID Controller host adapter card.• The connector at the other end of the cable attachesto the connector labeled “SCSI” on the SCSI back-plane board.CAUTION: Removing and installing hard-diskdrives with the system running is not supported forsystems without a PowerEdge Expandable RAID Con-troller host adapter card. Removing a drive in thissituation will result in a loss of data.WARNING: This system may have more than onepower supply cable. To reduce the risk of electricalshock, a trained service technician must disconnectall power supply cables before servicing the system.
