T10 Technical Committee site provides more information about I/O Interfaces, especially
SCSI, SCSI-2, and SCSI-3 including SPI-2 (Fast-40 or Ultra2 SCSI), Low Voltage
Differential (LVD), SPI-3 (Ultra3 SCSI or Ultra160), SPI-4 (Ultra320), SPI-5 (Ultra640),
Serial Attached SCSI (SAS).
Advanced Storage Concepts, Inc. is a world leader in providing Windows PC-based SCSI Target Mode emulation hardware/software packages.