A host bus adapter and one or more SCSI peripherals connected by cables in a linear chain configuration. The host bus adapter can exist anywhere on the chain, allowing connection of both internal and external SCSI devices. A system can have more than one SCSI bus by using multiple host bus adapters.
a parallel bus, meaning that there is a single set of parallel wires that go from device to device
The data stream running through cabling connecting a series of SCSI devices.
An expansion bus used by SCSI devices to send data to and receive data from system memory (RAM) and the CPU.
A parallel bus that carries data and control signals from SCSI devices to a SCSI controller.