Dell PowerEdge 650 - Manual (Page 57)

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Installing Drives
Dell™ PowerEdge™ 650 Systems Installation and Troubleshooting Guide
SCSI Configuration Information
Configuring the Boot Drive
Hard Drives
Installing a RAID or SCSI Controller Card
CD/Diskette Drives
The hard drive bays provide space for up to two IDE or SCSI hard drives and a CD/diskette drive combination. The IDE hard drives connect to the backplane
board and the SCSI hard drives must be connected to a controller card. The cables that connect to the controller card are routed through openings in the
backplane bracket and the PCI fan bracket.
SCSI Configuration Information
Although SCSI drives are installed in essentially the same way as other drives, their configuration requirements are different. To install and configure a SCSI
drive, follow the guidelines in the following subsections.
SCSI Interface Cables
SCSI interface connectors are keyed for correct insertion. Keying ensures that the pin-1 wire in the cable connects to pin 1 in the connectors on both ends.
When you disconnect an interface cable, take care to grasp the cable connector, rather than the cable itself, to avoid stress on the cable.
SCSI ID Numbers
Each drive attached to a SCSI controller must have a unique SCSI ID number from 0 to 15.
l The SCSI hard drive from which the system boots is configured as SCSI ID 0.
l If you install optional SCSI drives or change your SCSI configuration, see the documentation for each SCSI drive for information on setting the
appropriate SCSI ID number.
Device Termination
SCSI logic requires that termination be enabled for the two drives at opposite ends of the SCSI chain and disabled for all drives in between. For internal SCSI
drives, termination is configured automatically. See the documentation provided with any optional SCSI drive you purchase for information on disabling
termination.
Configuring the Boot Drive
The drive or device from which the system boots is determined by the boot order specified in the System Setup program. See "Using the System Setup
Program" in your User's Guide. To boot the system from a hard drive or drive array, the drive(s) must be connected to the appropriate controller:
l To boot from a single IDE hard drive, the master drive (drive 0) must be connected to the IDE 0 connector on the backplane board. To identify system
board connectors, see Figure A -3 .
l To boot from a single SCSI hard drive, the drive must be connected to the SCSI controller card. See the documentation that accompanied the controller
card.
NOTE: There is no requirement that SCSI ID numbers be assigned sequentially or that drives be attached to the cable in order by ID number.