Adaptec 3940AUW Manual de usuario

AHA-3940AU/AUW Installation Guide

Part Number: 511418-00, Rev. A

Print Spec Number: 496346-00

Current Date: 3/12/97 ECN Date: 3/10/97

Installation Guide

AHA-3940AU/AUW

MultiChannel PCI-to-UltraSCSI Host Adapters

with SCSISelect Utility

AHA-3940AU/AUW Installation Guide

Part Number: 511418-00, Rev. A

Print Spec Number: 496346-00

Current Date: 3/12/97 ECNDate:3/10/97

Getting Started

This Installation Guide tells you how to install and con-

figure AHA®-3940AU/AUW PCI-to-UltraSCSI host

adapters. These host adapters have two SCSI chan-

nels which operate like two independent host adapters.

AHA-3940AU/AUW host adapters are designed for

computers with PCI slots. PCI is a local bus interface

that enables high-speed data transfer. The computer in

which you install the host adapter must be compliant with

PCI 2.0 or higher and the motherboard BIOS must sup-

port PCI-to-PCI Bridges. If you are not sure whether

the motherboard BIOS supports PCI-to-PCI Bridges,

ask the motherboard or computer manufacturer.

The AHA-3940AU supports up to seven 8-bit SCSI

devices on each 8-bit SCSI channel. The

AHA-3940AUW supports up to fifteen 16-bit or 8-bit

SCSI devices on each 16-bit Wide SCSI channel; up to

seven of the devices can be 8-bit devices. Installation

procedures are the same for the AHA-3940AU and

the AHA-3940AUW.

Board Layout

The following diagrams and table show the major

AHA-3940AU, AHA-3940AUW components.

J6 J1

AHA-3940AU

AHA-3940AU/AUW Installation Guide

Part Number: 511418-00, Rev. A

Print Spec Number: 496346-00

Current Date: 3/12/97 ECNDate:3/10/97

1. See Termination in Multiple Computer Configurations on page 6.

2. High density 50-pin SCSI-2 connector.

1. High density 68-pin SCSI-2 connector.

2. See Termination in Multiple Computer Configurations on page 6.

Location Description

J1 Internal 50-pin SCSI connector, Channel A

J2 Internal 50-pin SCSI connector, Channel B

J3 Multiple computer termination jumper,Channel A1

J4 Multiple computer termination jumper,Channel B1

J5 External LED connector

J6 External 50-pin SCSI connector, Channel B2

Location Description

J1 Internal 68-pin SCSI connector, Channel A

J2 Internal 68-pin SCSI connector, Channel B

J3 External LED connector

J4 Internal 50-pin SCSI connector,Channel A

J5 External 68-pin SCSI connector, Channel B1

J6 Multiple computer termination jumper,Channel A2

J8 Multiple computer termination jumper,Channel B2

J5 J1

AHA-3940AUW J3

AHA-3940AU/AUW Installation Guide

Part Number: 511418-00, Rev. A

Print Spec Number: 496346-00

Current Date: 3/12/97 ECNDate:3/10/97

Default Settings

AHA-3940AU/AUW host adapters operate cor-

rectly with their factory default settings in most com-

puters with PCI slots. The following table lists the

settings and their default values. You can change

these settings with the SCSISelect utility. (See

Configuring the Host Adapter on page 8.)

1. Setting is valid only if Multiple LUN Support is enabled.

2. Default Setting for the AHA-3940AU is 10 MBytes/sec.

Default Setting for the AHA-3940AUW is 20 MBytes/sec.

3. Ultra speed for the AHA-3940AU is 20 MBytes/sec.

Ultra speed for the AHA-3940AUW is 40 MBytes/sec.

4. AHA-3940AUW only

5. Settings are only valid if channel BIOS is enabled.

SCSI Bus Interface Definitions Default Setting

Host Adapter SCSI ID 7

SCSI Parity Checking Enabled

Host Adapter SCSI Termination Automatic

Boot Device Settings DefaultSetting

Boot Channel A First

Boot SCSI ID 0

Boot LUN Number10

SCSI Device Configuration Default Setting

Initiate Sync Negotiation Yes (Enabled)

Maximum Sync Transfer Rate 10 MBytes/sec2,3

Enable Disconnection Yes (Enabled)

Initiate Wide Negotiation4Yes (Enabled)

Send Start Unit Command5No (Disabled)

BIOSMultiple Lun Support 5No (Disabled)

Include in BIOS Scan Yes (Enabled)

Advanced Configuration Options Default Setting

Plug and Play SCAM Support Disabled

Reset SCSI Bus at IC Initialization Enabled

Extended BIOS Translation for DOS Drives > 1 GByte5Enabled

Host Adapter BIOS (Configuration Utility Reserves BIOS

Space) Enabled

Support Removable Disks under BIOS as Fixed Disks5Boot Only

Display <Ctrl-A> Message During BIOS Initialization5Enabled

BIOS Support for Bootable CD-ROM5Enabled

BIOS Support for Int 13h Extensions5Enabled

AHA-3940AU/AUW Installation Guide

Part Number: 511418-00, Rev. A

Print Spec Number: 496346-00

Current Date: 3/12/97 ECNDate:3/10/97

Installing the Host Adapter

Inserting the Host Adapter in a PCI Slot

WARNING: Turn OFF and disconnect the

power to your computer and attached

devices before you remove the computer

cover.

1Remove the cover from the computer case.

2Locate an unused PCI expansion slot that sup-

ports bus mastering. Make sure this slot is not

obstructed by other system hardware.

PCI bus slots are usually white or ivory and are

shorter than ISA or EISA slots. Usually there are

three PCI slots. One of these may be a shared slot.

That is, it may have an ISA or EISA connector and

a PCI connector, but only one kind of board can

be inserted in the slot at any one time.

3Remove the corresponding expansion slot cover

from the computer chassis and save the screw.

4Hold the host adapter directly over the bus mas-

ter PCI slot and insert the end of the board in the

card guide. Carefully press the bus connector on

the bottom of the host adapter down into the slot.

5Attach the host adapter bracket to the computer

chassis with the screw from the expansion slot

cover that you removed.

Note: Do not replace the computer cover or

reconnect the power yet!

AHA-3940AU/AUW Installation Guide

Part Number: 511418-00, Rev. A

Print Spec Number: 496346-00

Current Date: 3/12/97 ECNDate:3/10/97

Connecting SCSI Devices

Caution: AHA-3940AU/AUW host adapters

support only single-ended SCSI devices. Do

not connect differential SCSI devices, because

they may damage the host adapter. Read the

SCSI device documentation if you are not

sure whether the device is single-ended or

differential.

Connecting Cables

SCSI devices are cabled together in a single,

connected series called the SCSI bus. SCSI cables

must run sequentially from one device to the next,

with no branching.

1Lay out the cables and find the pin-1 element of

each cable and device connector.

On internal cables, pin 1 is usually marked with a

contrasting color on one edge of the ribbon cable,

and a small triangle or number 1marks pin 1 on

the SCSI connector. External cables can only be

plugged in one way, so pin-1 orientation is

automatic.

2Attach the SCSI cable(s) to the host adapter and

the device(s), using the internal and/or external

connector(s). Be sure to maintain correct pin-1 ori-

entation throughout the bus for each channel. If

you are connecting 8-bit SCSI devices to

Channel A of an AHA-3940AUW, you may use

the internal 50-pin connector. If you must connect

8-bit SCSI devices to Channel B you will need

68-pin-to-50-pin converters. Refer to the User’s

Guide for detailed information or Adaptec’s

homepage under Cables.

On the AHA-3940AU host adapter, SCSI Channel

A has one internal 50-pin connector J1. Channel B

has one external J2 and one internal 50-pin con-

nector J6. The AHA-3940AUW Channel A has

one internal 68-pin connector J1, one internal

50-pin connector J4. Channel B has one internal

68-pin J2 and one external 68-pin connector J5.

AHA-3940AU/AUW Installation Guide

Part Number: 511418-00, Rev. A

Print Spec Number: 496346-00

Current Date: 3/12/97 ECNDate:3/10/97

If you want to connect only SCSI-1 or SCSI-2

devices (no UltraSCSI devices), the maximum

total cable length 6 meters (19.7 feet). If you want

to connect 4 or fewer UltraSCSI devices, the maxi-

mum total cable length is 3 meters (9.8 feet). For

configurations with 5 or more UltraSCSI devices,

maximum total cable length is 1.5 meters(4.9 feet).

See your device’s documentation to determine

whether it is an UltraSCSI device.

Terminating the SCSI Bus

The last physical SCSI device on each end of the SCSI

bus must be terminated. Termination must be

disabled on all other devices in the middle of the

SCSI bus. You may need to change the termination

setting on some devices in your computer system.

Terminating the Host Adapter

Host adapter termination is controlled by the

SCSISelect utility. The default setting is Automatic,

which works like this:

■If the host adapter detects that devices are con-

nected to both connectors on Channel B, it dis-

ables its terminators. Otherwise, the terminators

are enabled.

■For the AHA-3940AU, since there is only one con-

nector for Channel A, termination for this channle

is always enabled.

For the AHA-3940AUW, if the host adapter

detects that devices are connected to two of the

three connectors on Channel A, it disables its ter-

minators. Otherwise, the terminators are enabled.

If you need to change host adapter termination, com-

plete the physical installation, then run SCSISelect as

described in Configuring the Host Adapter on page 8.

Termination in Multiple Computer Configurations

If you are setting up your SCSI bus so that SCSI

devices are shared by host adapters in two different

computers, you can enable your host adapter to pro-

vide termination power even when one computer is

powered OFF. To do this, place a jumper shunt on

jumper J3 on the 3940AU or J6 on the 3940AUW if

the second computer is connected to SCSI Channel A

AHA-3940AU/AUW Installation Guide

Part Number: 511418-00, Rev. A

Print Spec Number: 496346-00

Current Date: 3/12/97 ECNDate:3/10/97

or on jumper J8 if the second computer is connected

to SCSI Channel B.

This feature works only when one computer is

turned off, and the other computer connected to the

same SCSI bus accesses the disk drives and other

SCSI devices on the bus.

Setting SCSI IDs

You must assign a different SCSI ID to each device on

the SCSI bus connected to the AHA-3940AU/AUW

host adapter. See your SCSI device documentation to

learn how to determine the ID and change it.

■ID 7 is the default SCSI ID for the host adapter on

both SCSI Channels A and B. You can change the

ID(s) in SCSISelect, if necessary. See Configuring

the Host Adapter on page 8.

■SCSI devices connected to an AHA-3940AU can

have IDs from 0 to 7. SCSI devices connected to

an AHA-3940AUW can have IDs from 0 to 15.

(The host adapter itself uses one SCSI ID on each

channel.)

■The SCSI IDs on one SCSI channel do not inter-

fere with the IDs on another SCSI channel.

■If you have two host adapters connected to the

same SCSI bus, be sure to assign them different

SCSI IDs, preferably IDs 7 and 6.

Completing the Installation

1Put the computer cover back on the computer,

following the directions in the documentation.

2Be sure all power switches are OFF, then recon-

nect power cables to your computer.

3Turn ON the power for the computer and the

peripheral device(s).

4If your system CMOS

Setup

requires you to

enable PCI bus parameters, do so now. Refer to

your computer documentation.

AHA-3940AU/AUW Installation Guide

Part Number: 511418-00, Rev. A

Print Spec Number: 496346-00

Current Date: 3/12/97 ECNDate:3/10/97

Note: The PCI bus is supposed to automati-

cally assign Interrupt channels (IRQs) and

port addresses. But because PCI is currently

combined with other bus architectures such

as ISA and EISA, you may need to edit the

PCI bus parameters in your CMOS

Setup

When the computer boots, the host adapter BIOS

sign-on message appears on the screen. This mes-

sage includes a list of installed SCSI devices and

information about the BIOS. In most cases your com-

puter, host adapter, and SCSI devices are ready to

use, and you do not need to run SCSISelect.

Configuring the Host Adapter

Your AHA-3940AU/AUW host adapter includes

the built-in SCSISelect configuration utility.

SCSISelect lets you change host adapter settings,

such as SCSI Parity Checking and Host Adapter

SCSI ID, without opening your computer or flipping

switches.

To run SCSISelect, press Ctrl-A immediately when

the SCSISelect Ctrl-A message appears on the screen

at the time your computer boots.

Use the arrow (↑↓) and Enter keys to make selec-

tions in the SCSISelect Options menu. Press Esc at

any time to return to the previous menu. You can

press F6 to restore the original default settings. To

abandon changes you made in the Configure/View

HostAdapter Settings menu, pressEsc and select No

when asked if you want to save the changes.

The first SCSISelect screen asks you to choose SCSI

Channel A or Channel B. You can only configure one

SCSI channel at a time. If you have multiple host

adapters, the screen displays a list of SCSI channels

for all installed host adapters.

Configure/View Host Adapter Settings

The Configuration screen displays the basic options

for each SCSI channel: Host Adapter SCSI ID, SCSI

Parity Checking, Host Adapter SCSI Termination,

AHA-3940AU/AUW Installation Guide

Part Number: 511418-00, Rev. A

Print Spec Number: 496346-00

Current Date: 3/12/97 ECNDate:3/10/97

Boot Device Options, SCSI Device Configuration,

and Advanced Configuration Options. Highlight an

option and press Enter to see a list of possible values.

Select SCSI Device Configuration to see a menu of

the following options for each device on the SCSI

bus: Initiate Sync Negotiation, Maximum Sync

Transfer Rate, Enable Disconnection, Initiate Wide

Negotiation(for 3940AUW only), Send Start Unit

Command, BIOS Multiple LUN Support, and

Include In BIOS Scan. These settings apply to indi-

vidual SCSI devices.

Select Advanced Configuration Options for a menu

that includes these advanced options: Host Adapter

BIOS (Configuration Utility Reserves BIOS Space),

Support Removable Disks as Fixed Disks, and

Extended BIOS Translation for DOS Drives

>1GByte.

SCSI Disk Utilities

When you select SCSI Disk Utilities from the

Options menu, a list of installed SCSI devices

appears. When you select a device the Utilities menu

appears, giving you the following two choices:

■Format Disk—runs the Adaptec SCSI low-level

format utility. Most SCSI devices are preformat-

ted and do not need to be formatted again.

■Verify Disk Media—scans the selected device’s

media for defects. If bad blocks are found, you are

prompted to reassign them; if you select Yes,

those blocks are no longer used.

Operating System Software

Your AHA-340AU/AUW host adapters are sup-

ported by the following: DOS, Windows 3.x, Win-

dows 95, Windows NT, Novell NetWare, OS/2,

Unix, and UnixWare.

Under MS-DOS 5.0 or later, you can install up to

eight hard disk drives (SCSI or non-SCSI) in your

computer without using additional software. Older

versions of DOS support up to two hard disk drives.

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