S1837 Thunderbolt
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1. INTRODUCTION
With the dual channel onboard Ultra2 SCSI connectors, you can connect up to
30 SCSI peripherals, such as hard disk drives, scanners, CD-ROM drives, and
tape drives. This guide provides instructions for
• Connecting SCSI peripherals
• Installing the AIC7986 software
The motherboard has two independent Ultra2 LVD SCSI channels and each
has a maximum throughput of 80MBytes/sec.
Support for Non-Ultra2 SCSI Devices
The LVD signaling used for Ultra2 devices operates differently than single-
ended signaling used on Ultra, Fast, and Fast Wide SCSI devices. Ultra2 SCSI
devices are designed with multimode capability so that if a single-ended device
is connected to the LVD Ultra2 SCSI bus, the Ultra2 devices automatically
switch to single-ended mode. When an Ultra2 SCSI device operates in single-
ended mode it is subject to the cable distance limitations and signal noise
problems of that interface.
appendix
2
Adaptec Ultra2 LVD SCSI