A physical requirement of parallel SCSI. Both ends of the SCSI bus should have termination enabled, and devices between the ends of the bus should have terminating resistors removed.
Termination means that special electrical resistors (terminators) are installed in the devices at each end of the bus and are not installed in other devices on the bus. With some SCSI devices you must manually insert or remove the terminators. Many of the Quantum drives that supply termination have terminators built in that can be enabled via the TE jumper. Other devices have built-in terminators that are enabled or disabled via switches or software commands. Quantum's LVD drives do not supply on board termination, and the SCSI bus must be terminated by other means, such as LVD/SE cable terminators.
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