Adaptec 2940U2W - Storage Controller U2W SCSI 80... Manual de usuario

USER’S

REFERENCE

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▼ ▼ ▼ ▼ SCSI Card 2940U2W

User’s Reference

iii

▼ ▼ ▼ ▼ Contents

Understanding SCSI 1

SCSI IDs 1

SCAM Protocol 2

Terminating the SCSI Bus 3

Troubleshooting 4

Troubleshooting Checklist 4

Troubleshooting in Windows 95 5

Common Error Messages 9

Using the SCSI Card 2940U2W and SCSI

Peripherals 10

Using SCSI Peripherals 10

Hard Disk Drives 10

Scanners 11

SCSI Peripheral Display at Bootup 12

Installing Multiple SCSI Cards 12

Connecting the LED Connector 13

Using SCSI and IDE (or EIDE) Peripherals 14

Replacing a Non-Adaptec SCSI Card with an Adaptec SCSI

Card 14

Configuring the SCSI Card 2940U2W with

SCSI

Select

Starting SCSISelect 16

Exiting SCSISelect 17

Using SCSISelect Settings 17

Basic Host Adapter Settings 17

Boot Device Options 18

SCSI Card 2940U2W User’s Reference

SCSI Device Configuration 19

Advanced Configuration Options 20

Using SCSI Disk Utilities 22

Obtaining SCSI Cables and Adapters 23

External Cables 23

External Connector Diagrams 23

Internal Cables 24

Internal Connector Diagrams 24

Cabling Examples 25

Maximum Cable Lengths 27

❒

Understanding SCSI

SCSI (pronounced “scuzzy”) stands for Small Computer Systems

Interface. SCSI is an industry standard computer interface for con-

necting SCSI peripherals (such as a hard disk drive, CD-ROM drive,

or scanner) to a common SCSI bus.

A SCSI bus is an electrical pathway that consists of a SCSI adapter

card (such as the SCSI Card 2940U2W) installed in a computer and

one or more SCSI peripherals. SCSI cables are used to connect the

peripherals to the SCSI adapter card.

For the SCSI bus to function properly, SCSI IDs must be assigned to

SCSI devices (SCSI peripherals and SCSI card), and the SCSI bus

must be properly terminated.

SCSI IDs

Each peripheral attached to the SCSI Card 2940U2W, as well as the

SCSI Card 2940U2W itself, must be assigned a unique SCSI ID num-

ber from 0 to 15. A SCSI ID uniquely identifies each SCSI device on

the SCSI bus and determines priority when two or more devices are

trying to use the SCSI bus at the same time.

Refer to the peripheral’s documentation to set the SCSI ID. Here are

some general guidelines for SCSI IDs:

■For internal SCSI peripherals, the SCSI ID usually is set by con-

figuring a jumper on the peripheral.

■For external SCSI peripherals, the SCSI ID usually is set with a

switch on the back of the peripheral.

SCSI Card 2940U2W User’s Reference

■SCSI ID numbers don’t have to be sequential, as long as the

SCSI Card 2940U2W and each peripheral has a different num-

ber. For example, you can have an internal SCSI peripheral

with ID 0, and an external SCSI peripheral with ID 6. Gaps in

the sequence of numbers don’t matter.

■SCSI ID 7 has the highest priority on the SCSI bus. The priority

of the remaining IDs, in descending order, is 6 to 0, 15 to 8.

■The SCSI Card 2940U2W is preset to SCSI ID 7 and should not

be changed. This gives it the highest priority on the SCSI bus.

■Most internal SCSI hard disk drives come from the factory pre-

set to SCSI ID 0.

■If you have 8-bit SCSI peripherals, they must use SCSI IDs 0, 1,

2, 3, 4, 5, or 6. SCSI ID 0 is recommended for the first SCSI hard

disk drive.

■If you are booting your computer from a SCSI hard disk drive

connected to the SCSI Card 2940U2W, the Boot Target ID set-

ting in the SCSISelect utility must correspond to the SCSI ID of

the peripheral from which you are booting. By default, the

Boot Target ID is set to 0. See Boot Device Options on page 18 to

change the Boot Target ID.

■In Windows®95, you can use the Device Manager to view the

SCSI ID (and other details) assigned to each SCSI device

installed.

■If you installed Adaptec®EZ-SCSI®software, you can use the

SCSI Explorer utility to view the SCSI ID (and other details)

assigned to each SCSI device installed.

SCAM Protocol

The SCSI Card 2940U2W supports the SCSI Configured AutoMati-

cally (SCAM) protocol, which assigns SCSI IDs dynamically and

resolves SCSI ID conflicts automatically when you start the com-

puter. If your computer includes SCSI disk drives or other peripher-

als that support SCAM, you do not need to manually assign SCSI

IDs to these peripherals. To enable SCAM support, see Configuring

the SCSI Card 2940U2W with SCSISelect on page 15.

Understanding SCSI

Terminating the SCSI Bus

To ensure reliable communication on the SCSI bus, the ends of the

SCSI bus must be properly terminated. This is accomplished when

the peripheral at the end of each cable, or the end of the cable itself,

has a terminator installed (or enabled). The peripherals between the

ends of each cable must have its terminator removed (or disabled).

Since the method for terminating a SCSI peripheral can vary widely,

refer to the peripheral’s documentation for instructions on how to

enable or disable termination. Here are some general guidelines for

termination:

■Termination on internal SCSI peripherals usually is controlled

by manually setting a jumper or a switch on the peripheral, or

by physically removing or installing one or more resistor mod-

ules on the peripheral.

■Termination on external SCSI peripherals usually is controlled

by installing or removing a SCSI terminator. On some external

peripherals, termination is controlled by setting a switch on the

back of the drive.

■By default, termination on the SCSI Card 2940U2W itself is

automatic (the preferred method). To manually set termination

on the SCSI Card 2940U2W, see Configuring the SCSI Card

2940U2W with SCSISelect on page 15.

■Internal Ultra2 peripherals are set at the factory with termina-

tion disabled and cannot be changed. Proper termination for

internal Ultra2 peripherals is provided by the built-in termina-

tor at the end of the Ultra2 internal SCSI cable.

■Most non Ultra2 SCSI peripherals come from the factory with

termination enabled.

SCSI Card 2940U2W User’s Reference

Troubleshooting

Most problems can be resolved by following the recommendations

in Troubleshooting Checklist below. If you still experience problems

after following the recommendations, continue with the remainder

of this section.

Troubleshooting Checklist

Most problems with using the SCSI Card 2940U2W result from

errors in preparing and connecting peripherals on the SCSI bus. If

you have problems, check these items first.

Note:

If you have problems with a specific SCSI peripheral

when other connected SCSI peripherals are working cor-

rectly, please contact the manufacturer of the problem

peripheral for troubleshooting information.

■Are all SCSI peripherals turned on?

■Are all SCSI cables and power cables properly connected?

■Is the SCSI Card 2940U2W firmly seated and secured in the

PCI expansion slot?

■Is the PCI expansion slot PCI Rev. 2.1 or higher compliant and

does it support Bus Mastering?

■Are all SCSI peripherals and the SCSI Card 2940U2W assigned

unique SCSI IDs? (See Setting Up SCSI Peripherals on page 3.)

■Are all SCSI peripherals terminated properly? (See Setting Up

SCSI Peripherals on page 3.)

■If your computer allows you to set up configuration options

when the computer first boots up (that is, through CMOS

setup), are the following options set up as specified?

■If there is an Interrupt Type or Interrupt Line option in the

Setup program, select Int-A or Interrupt Type = A (you

may also be required to change a motherboard jumper set-

ting).

■If there is a Triggering Interrupt option, select Level.

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