SCSI Technical Supplement
When configuring SCSI devices, you should consider the following issues:
Jumper block and DIP switch settings for device IDs (used primarily on internal drives)
The overall length of the SCSI daisy-chain
The method used for terminating the ends of a SCSI daisy-chain
See the following sections for details.
Jumper Block and DIP Switch Settings for Device IDs
Each SCSI device must have a unique device ID to distinguish itself from other SCSI devices connected to the same SCSI channel. Narrow SCSI (50-pin data cable) devices use a set of three jumpers or DIP switches to set the device ID. Wide SCSI (68-pin data cable) devices use a set of four jumpers or DIP switches to set the device ID.
The device ID is set in binary (base ...