Overview, Ultra160 Scsi on the Adaptec Scsi Card

Overview

Ultra160 SCSI on the Adaptec SCSI Card 39160

The Adaptec SCSI Card 39160 enables you to connect up to 30 SCSI devices—such as very large arrays of high-performance HDDs, external storage subsystems, clustered configurations, Ultra160 hard disk drives, scanners, and CD-ROM drives—to any Intel-based com- puter with 64- or 32-bit PCI expansion slots. Ultra160 is a new gener- ation of SCSI technology that increases SCSI performance from

80 MBytes/sec to 160 MBytes/sec. In addition to providing much greater performance, Ultra160 SCSI enables a maximum allowable cable length of 12 meters for optimal connectivity and flexibility.1

The Adaptec SCSI Card 39160 has two independent SCSI channels, each with a maximum throughput of 160 MBytes/sec.

■SCSI Channel A (marked “CH 1/A” on the card) has two internal connectors and one external connector.

■SCSI Channel B (marked “CH 2/B” on the card) has one inter- nal connector and one external connector.

For the best data I/O performance, connect only LVD (Low Voltage Differential) devices and LVD cables to the Adaptec SCSI Card 39160. (LVD devices means Ultra160 and Ultra2 SCSI devices.) If you connect non-LVD devices (for example, Fast SCSI or Ultra SCSI devices), we recommend that you connect them to SCSI Channel A. This allows you to operate Ultra160 and Ultra2 devices at their max-

1When only one Ultra2 or Ultra160 SCSI device is connected, the cable length can be up to 25 meters (82 feet).