Dell PowerEdge SC 420 - Manual (Page 54)

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Installing Drives
Dell™ PowerEdge™ SC420 Systems Installation and Troubleshooting Guide
General Installation Guidelines
Front-Panel Inserts
Hard Drives
Installing a SCSI Controller Card
Diskette Drive (Optional)
5.25-Inch Optical and Tape Drives
The drive bays in your system provide space for up to two SATA or SCSI hard drives, two 5.25-inch drives, and an optional diskette drive. See
Figure 7 -1 .
Figure 7-1. Drive Locations Inside the System
General Installation Guidelines
SCSI Installation Guidelines
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 an additional SCSI drive or change your SCSI configuration, see the documentation for each SCSI drive for information on setting the
appropriate SCSI ID number.
NOTE: The SCSI controller card must be installed in PCI slot 2 or slot 3.
NOTE: SCSI devices installed by Dell are configured correctly during the manufacturing process. You do not need to set the SCSI ID for these drives.
NOTE: There is no requirement that SCSI ID numbers be assigned sequentially or that drives be attached to the interface cable in order by ID number.