Adaptec 39160 Manuale utente

USER’S

REFERENCE

ADAPTEC SCSI CARD 39160

ULTRA160 SCSI CONTROLLER

are trademarks of Adaptec, Inc. which may be

registered in some jurisdictions.

Printed in Singapore

STOCK NO.: 512478-03, Rev. A KGL 11/99

(SRC: 512478-00, Ver. AA)

Adaptec, Inc.

691 South Milpitas Boulevard

Milpitas, CA 95035

▼ ▼ ▼ ▼ Adaptec SCSI Card 39160

Ultra160 SCSI Controller

User’s Reference

iii

▼ ▼ ▼ ▼ Contents

Overview 1

Ultra160 SCSI on the Adaptec SCSI Card 39160 1

Understanding SCSI 2

SCSI IDs 3

Terminating the SCSI Bus 4

Troubleshooting 5

Troubleshooting Checklist 5

Troubleshooting in Windows 95/98 6

Common Error Messages 10

Using the Adaptec SCSI Card 39160 and SCSI

Devices 11

Using SCSI Devices 11

Using SCSI Hard Disk Drives 11

Using Ultra160 Hard Disk Drives 12

Using Scanners 12

Combining SCSI and Non-SCSI Devices 13

Installing Multiple SCSI Cards 14

Connecting the LED Connector 14

Overriding SCSI Termination Settings 15

Configuring the Adaptec SCSI Card 39160 with

SCSI

Select

Starting SCSISelect 18

Exiting SCSISelect 18

Using SCSISelect Settings 19

SCSI Bus Interface Definitions 19

Boot Device Options 19

SCSI Device Configuration Options 20

Adaptec SCSI Card 39160 User’s Reference

Advanced Configuration Options 21

Using SCSI Disk Utilities 24

Connecting SCSI Devices 25

Maximum Cable Lengths 26

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-

1 WhenonlyoneUltra2orUltra160SCSIdeviceisconnected, thecablelength

can be up to 25 meters (82 feet).

Adaptec SCSI Card 39160 User’s Reference

imum speed on Channel B while at the same time using non-LVD

SCSI devices on Channel A.

Although the Adaptec SCSI Card 39160 is a 64-bit PCI card, it also

works in a 32-bit PCI slot. When installed in a 32-bit PCI slot, the

card automatically runs in the slower 32-bit mode.

This User’s Reference provides information about troubleshooting,

SCSI termination, and other important topics. It also explains how to

use the built-in SCSISelect utility if you need to change the Adaptec

SCSI Card 39160 settings.

Note:

Read the Adaptec SCSI Card 39160 Installation Guide if

you need instructions on installing the SCSI Card and con-

necting SCSI devices to it.

Understanding SCSI

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

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

necting SCSI devices (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 Adaptec SCSI Card 39160) installed in a computer

and one or more SCSI devices. SCSI cables are used to connect the

devices to the SCSI adapter card. The Adaptec SCSI Card 39160 has

two independent SCSI buses (channels).

For the SCSI bus to function properly, a unique SCSI ID must be

assigned to the SCSI card and each SCSI device connected to it, and

the SCSI bus must be properly terminated.

Overview

SCSI IDs

Each device attached to the Adaptec SCSI Card 39160, as well as the

Adaptec SCSI Card 39160 itself, must be assigned a unique SCSI ID

number from 0 to 15 for each of the two SCSI buses. A SCSI ID

uniquely identifies each SCSI device on the SCSIbus and determines

priority when two or more devices are trying to use the SCSI bus at

the same time.

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

some general guidelines for SCSI IDs:

■For internal SCSI devices, the SCSI ID usually is set by config-

uring a jumper on the device.

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

switch on the back of the device.

■SCSI ID numbers do not need to be sequential, as long as the

Adaptec SCSI Card 39160 and each device has a different num-

ber. For example, on each of the two SCSI buses you can have

an internal SCSI device with ID 0, and an external SCSI device

with ID 6.

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

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

■On both SCSI buses (channels) the Adaptec SCSI Card 39160 is

preset to SCSI ID 7 and should not be changed. This gives the

card 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 (or Narrow) SCSI devices, 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 Adaptec SCSI Card 39160, the Boot SCSI ID

setting in the SCSISelect utility must correspond to the SCSI ID

of the device from which you are booting. By default, the Boot

SCSI ID is set to 0. We recommend that you do not change this

setting.

■In Windows®95/98, you can use the Device Manager to deter-

mine which SCSI ID is assigned to each installed SCSI device.

Adaptec SCSI Card 39160 User’s Reference

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 device at the end of each cable, or the end of the cable itself, has a

terminator installed (or enabled). Terminators must be removed, or

termination must be disabled, on devices between the ends of each

cable.

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

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

enable or disable termination. Here are some general guidelines for

termination:

■Internal Ultra160 and Ultra2 SCSI devices come from the fac-

tory with termination disabled and cannot be changed. Proper

termination for these internal devices is provided by the built-

in terminator at the end of the 68-pin internal LVD SCSI cable.

■Termination on Wide SCSI, Narrow SCSI, and Ultra SCSI

devices usually is controlled by manually setting a jumper or a

switch on the device, or by physically removing or installing

one or more resistor modules on the device.

■Termination on most external SCSI devices is controlled by

installing or removing a SCSI terminator. However, termina-

tion on some external SCSI devices is enabled or disabled by

setting a switch on the back of the SCSI device.

■By default, termination on the Adaptec SCSI Card 39160 itself

is set to Automatic (the preferred method). We recommend that

you do not change this default setting.

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