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Brave New World: Operating IDE Hard Drives on SCSI Host Adapters

SCSI: Worth Knowing

The SCSI connection has 68 small pins (top). IDE, by contrast, gets by with 40 terminal pins.

A typical Ultra160 SCSI cable has between three and five connectors for drives. Top-class versions have up to 15 of them.

The SCSI specification stipulates that both ends of the SCSI bus have to be terminated, i.e., must have a bus terminating resistor to prevent signal reflections.