The 5000, 5100 and 7000 series were all SCSI-1 type devices and are no longer in production. The 7100 and 9100 series are switchable SCSI-1 and SCSI-2 devices and are still being produced. NOTE: SCSI-2 is the current prevalent industry standard. DE-7001 Series The DE-7001 series includes the DE-S7001 and DE-U7001 models. The DE-S7001 is an external subsytem including drive unit, SCSI controller and DC power supply. The DE-U7001 is an internal full height drive unit with SCSI controller. Both mod