1. Centronics - SCSI 1
2. HD50 - SCSI 2
3. HD68 - SCSI 2 Wide, or SCSI 3
4. VHDCI (Very High Density Cable Interconnect) - SCSI 3, Ultra 160, LVD

SCSI Bus Lengths

1. SCSI 1 - 6m
2. SCSI 2 - 6m
3. SCSI 3 SE - 2m
4. LVD 12m (multi=drop), or 25m (point to point)