PCA-6005 User’s Manual
72
Chapter 6 SCSI Setup and Configuration
6.1 Introduction
The PCA-6005 is equipped with an Adaptec AIC-7899 single-chip PCI-
to-SCSI host adapter which provides a dual channel Ultra 160 multi-
tasking interface between your computer.s PCI bus and SCSI devices
(disk drives, CD-ROM drives, scanners, tape backups, removable media
drives, etc.). Ultra 160 is a new generation of SCSI technology that
expands SCSI performance from 80 MBytes/sec to 160 MBytes/ sec. Up
to a total of 15 SCSI devices can be connected to each of the SCSI con-
nectors.
The AIC-7899 combines this Ultra 160 SCSI technology with Adaptec.s
SpeedFlex. technology. SpeedFlex allows the Adaptec SCSI card to be
backwards compatible with previous generations of SCSI products, while
allowing newer Ultra 160 SCSI devices to operate at the higher 160
MBytes/sec rate.
There are 3 SCSI connectors on the CPU card: CN50 and CN51 for Ultra
160 devices, and CN52 for 50-pin SCSI devices. You can use Ultra 160
and Ultra wide devices simultaneously without compromising the perfor-
mance.
If you need to configure the SCSI, the onboard SCSI Select configuration
utility allows you to change host adapter settings without opening the
computer or handling the board. The SCSI Select utility also contains a
utility to low-level format and verifies the disk media on your hard disk
drives.
6.2 Understanding SCSI
SCSI (pronounced .scuzzy.) stands for Small Computer Systems Inter-
face. SCSI is an industry standard computer interface for connecting
SCSI devices to a common SCSI bus.
Note:
If any peripheral is running at SE mode, the
Ultra 160 SCSI segment will run at speeds up to
40 MBytes/sec only instead of 160 MBytes/sec.
Summary of Contents for PCA-6005
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