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Features 1 – Introduction
1-2 DC8151101-00 C
The QLA12160 board supports Ultra, Ultra2, and Ultra3 transfer speeds. The board
can connect computers to other computers or to peripheral devices such as
CD-ROM drives, tape drives, and hard disk drives. SCSI allows connecting the
following numbers and types of devices to a single port by daisy chaining:
■ 15 fast, wide SCSI devices
■ 15 Ultra2 or Ultra3, LVD SCSI devices
■ 6 Ultra SCSI devices (QLA12160 board in single-ended mode)
A daisy chain is a series of connections where the first device is connected to the
host adapter board, the second device is connected to the first device, and so on.
A daisy chain can be created either by using a daisy chain cable (one cable with
multiple connectors) or by using multiple cables. Each SCSI device must have a
unique SCSI ID.
Because SCSI allows the computer to use a standard set of commands to
communicate with peripherals, adding a variety of peripherals to your computer
using one host adapter board is easy.
1.2
Features
■ Compliance with Intel PCI version 2.2 specification
■ Compliance with ANSI X3.131-1994 SCSI-2 standard
■ Compliance with ANSI X3T10/1071D SCSI-3 Fast-20 standard (Ultra SCSI)
■ Compliance with ANSI X3T10/1142D Fast-40 draft (Ultra2 SCSI)
■ Compliance with ANSI T10 project 855D, Information Technology—SCSI-3
Parallel Interface (SPI)
■ Compliance with ANSI T10 project 1142D, Information Technology—SCSI
Parallel Interface-2 (SPI-2)
■ Compliance with ANSI T10 project 1302D, Information Technology—SCSI
Parallel Interface-3 (SPI-3)
■ Compliance with U.S. and international safety and emissions standards
■ Support for asynchronous and synchronous transfer modes
■ Support for synchronous SCSI data transfer rates:
❑ Ultra3, LVD SCSI (160 MBps)
❑ Ultra2, LVD SCSI (80 MBps)
❑ Ultra SCSI wide (40 MBps)
❑ Ultra SCSI narrow (20 MBps)
❑ Fast SCSI wide (20 MBps)
❑ Fast SCSI narrow (10 MBps)
❑ SCSI narrow (5 MBps)
■ Support for single-ended mode