Small Computer System Interface Subsystem (Parallel SCSI)

This overview describes the interface between a small computer system interface (SCSI) device driver and a SCSI adapter device driver. The information in the article is specific for the parallel SCSI implementation.

Parallel SCSI is the traditional physical transport that was originally described in the SCSI-1 and SCSI-2 standards, culminating in support of Ultra 320. In the original implementation, SCSI was both a physical transport (parallel bus) and a logical command and response protocol. In the following topics, the term SCSI is used only for the traditional, parallel bus implementation of SCSI. The following topics can help you design and write a parallel SCSI device driver that can interface with an existing parallel SCSI adapter device driver. You can also use the following topics to design and write a parallel SCSI adapter device driver that interfaces with existing parallel SCSI device drivers.

For information about the implementation of SCSI on Fibre Channel (FCP), iSCSI and SAS transport types, see SCSI Architectural Model Subsystem.