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Installing the Host Adapter

Follow these instructions to install the host ad apter:

1 Turn OFF pow er to the compu ter and peripheraldevices and disconnect the pow er cords.

2 Remove the cover from the compu ter case.

3 Locate an un used 32-bit PCI expansion slot (theslot must sup port Bus Master data transfers);

unscrew an d remove the metal bracket that covers

the card-slot opening. (Save the screw to u se when

securing the host adapter in your computer.)

PCI slots are shorter th an ISA or EISA slots and

are typically white. One of these may be a shared

slot into w hich you can insert either an ISA/ EISA

board or a PCI board.4 Insert the host adap ter in the PCI expansion slot.

Press it d own firmly so that the contacts are

securely seated in the slot.

5 When the host adap ter is firmly seated in theexpansion slot, secure the meta l bracket of the host

adap ter with the screw you removed in step 3.

Do notreplace the computer cover or reconnect your

computer and peripherals to their pow er sources yet!

SCSI Configuration Guidelines

Before installing your SCSI devices, you shou ldun derstan d the basic SCSI concepts described in this

section. The information w ill help you set up you r

host adap ter and devices so they function prop erly.

SCSI ID NumbersEach d evice attached to th e host ad apter, as well as

the host ad apter itself, mu st have a u nique SCSI ID

nu mber (0 to 7 for the AHA-2940Ultra, and 0 to 15 for

the AHA -2940Ultra Wide).

We recommend that you leave the host adap ter set

to its default setting of SCSI ID 7. If you need to

change the host ad apter SCSI ID, see Configuring theHost A dapteron page 7. To change the SCSI ID on

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your h ard d isk and other SCSI dev ices, refer to the

devices documentation.

The host adap ter sup ports the SCSI Configured

AutoM atically (SCAM) p rotocol, wh ich assigns SCSIIDs dyn amically and resolves SCSI ID conflicts au to-

matically at bootu p. If your system includ es SCSI

disk d rives or other devices that sup port SCAM, you

do not need to man ually assign SCSI IDs to these

dev ices. To enable SCAM support, see Configuring

the Host Adapteron p age 7.

Most SCSI dev ices currently in u se, however , do not

sup port SCAM. The SCSI IDs on these devices mu st

be set man ua lly. To change the SCSI IDs on these

dev ices, refer to the d evices documen tation.

Note: If you p lan to boot your compu terfrom a SCSI device attached to th e host

ada pter, set the Boot Target ID setting in th e

SCSISelectutility to correspond to the SCSI

ID of the d evice you are booting from (see

Configuring the Host Adapteron page 7).

SCSI TerminatorsTo ensu re reliable commu nication, the SCSI bus m ust

be properly terminated . Termina tion is controlled by

a set o f electrical resistors, called terminators. Termi-

nators must be p laced (or enabled) at the twoextreme end s of the SCSI bus. All devices that lie

between the ends m ust have their terminators

removed (or disabled).

Terminating the AHA-2940UltraTermination on th e AH A-2940Ultra itself is con-

trolled by software comm and s via the SCSISelect

utility. The d efault setting isAutomatic, which works

like this:

s If the AHA-2940Ultra detects that a cable is con-

nected to either its interna l or external SCSI con-

nector, then it enables its terminato rs (the

AHA-2940Ultra is at the en d of the SCSI bus).

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s If the AHA-2940Ultra detects that a cable is con-

nected to both its internal and external SCSI con-

nector, then it disables its terminators (the

AHA-2940Ultra lies between the ends of the SCSI

bus).

We recommend that you leave the AHA-2940Ultra

set to its default setting ofAutomatic. If you wan t to

man ually enable or d isable the AHA-2940Ultra ter-

mination setting, see Configuring t he Host A dapteron

page 7.

Terminating the AHA-2940UltraWideTermination on th e AH A-2940Ultra Wide itself is

controlled by software comman ds via the SCSISelect

utility. The d efault setting is set toAutomatic.

We recomm end that you leave the AHA-2940UltraWide set to its default setting ofAutomatic. If you

want to man ually set the AHA-2940Ultra Wide ter-

mination setting, see Configuring t he Host A dapteron

page 7. The following table lists the term ination set-

tings for manual configuration.

Terminating SCSI DevicesRead the devices documentation to determine how

to enable or disable termination on your particular

SCSI device(s). On m ost inter nal SCSI devices the ter -

mination setting is controlled by a jum per or a

switch. On other inter nal SCSI dev ices you m ust

physically remove or install resistor m odu le(s). On

most externa l SCSI devices, a terminating plug (a

resistor pack embedd ed in a sm all plug) is installed

or removed to control termination.

AHA-2940UltraWide Termination

Devices Connected to AHA-2940UltraWide Low High

68-pin internal connector only ON ON

68-pin external connector only ON ON

68-pin internal and 68-pin external connectors OFF OFF

50-pin internal connector only ON ON

50-pin and 68-pin internal connectors OFF ON

50-pin internal and 68-pin external connectors OFF ON

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Installing SCSI Devices

You can connect up to a total of seven internal and

external 8-bit SCSI devices to the AHA-2940Ultra, andup to 15 devices (seven 8-bit internal and eight Wide

(16-bit) internal or external SCSI devices, or 15 Wide

interna l and external SCSI devices) to the

AHA-2940Ultra Wide.

Note: You m ay only u se two of thethree connectors at any one time on the

AHA-2940Ultra Wide host adapter.

Choosing SCSI CablesThe cables required to connect SCSI devices are

determ ined by the typ e of dev ices you are installing,as described in th e following tab le.

If you pu rchased your AHA-2940Ultra/ 2940Ultra

Wide in an Adaptec kit, the kit includ es an internal

SCSI cable that allows you to conn ect up to t wo

internal SCSI devices (the AHA-2940Ultra kit

includ es a 50-pin internal SCSI cable, and the

AHA-2940Ultra Wide kit includes both a 50-pin and

a 68-pin internal SCSI cable). If you are connecting

more than tw o internal SCSI devices, you mu st

obtain an internal SCSI cable with enough connec-

tors to accomm odate all of your d evices.

Adaptec sells high-quality internal and external SCSI

cables. If your r eseller d oes not stock these cables,

you can ord er them d irectly from Ad aptec.

When Fast SCSI dev ices are connected to the h ost

adapter, the tota l length of all cables (internal and

SCSI Device Type AHA-2940Ultra AHA-2940UltraWide

8-bit Internal SCSI 50-pin internalSCSI cable

50-pin internalSCSI cable

8-bit External SCSI 50-pin high-densityexternal SCSI cable

16-bit InternalWide SCSI

68-pin internalSCSI cable

16-bit ExternalWide SCSI

68-pin externalSCSI cable

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external) must not exceed 3 meters (9.8 ft.) to ensure

reliable operation. If no Fast SCSI devices are con-

nected, the total length of all cables mu st not exceed

6 meters (19.7 ft). See your devices documentation

to determine if it is a Fast SCSI device.

Connecting Internal SCSI DevicesIf you are connecting internal SCSI devices, make

sure you h ave an intern al SCSI cable with en ough

connectors to accomm odat e all of your d evices.

1 Prepare each SCSI device for installation; config-ure the device SCSI ID and terminator s (terminate

the last internal device attached to the cable). For

instructions, see the devices docum entation as

well as SCSI Configuration Guidelines on page 2.

2 Install the SCSI device in you r comp uter. Refer toyour compu ter and d evice documentation forinstructions.

3 Plug the connector at one end of the internal SCSIcable into the h ost adapter s internal SCSI

connector.

Make sure the colored strip e on one side of the

cable is aligned with pin-1 of the host ad apter s

connector. Pin-1 of the connector is u sually d esig-

nated by a small triangle (v), or a 1 on th e

connector.

4 Plug the rem aining connectors on the cable into

the connectors on th e backs of the devices.

Make sure the colored strip e on the cable is

aligned w ith p in-1 of the devices connector.

5 Connect a DC pow er cable (from you r com-pu ters pow er supp ly) to the pow er connector on

the SCSI device.

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Connecting External SCSI DevicesIf you are conn ecting external SCSI dev ices to you r

host ad apter, you m ust obta in an external SCSI cable

for each external device you install.1 Prepare each SCSI device for installation; config-

ure the SCSI ID and attach a termina ting plug into

the last external d evice. For instructions, see the

devices docum entation as w ell as SCSI Configura-

tion Guidelines on page 2.

2 Plug the connector at one end of the external SCSIcable into the host adap ter s external SCSI

connector.

3 Plug the connector at the other end of the cable toeither one of the SCSI connectors on the external

SCSI device.

4 To connect other external SCSI devices, daisy-chain each device to the previous d evice un til all

external SCSI devices have been conn ected.

Using the LED Connector

(Optional) Most comp u ters have an LED d isk activity

light on the front pan el. If you d isconnect the cable

from th e LED connector on th e motherboard and

connect it to the LED connector on the host ad apter,

the LED on the front pan el of the computer w ill light

wh enever there is activity on the SCSI bus.

Reassembling the Computer

Be sure all pow er switches are OFF, then rep lace the

comp uter chassis cover and reconnect the p ower

cables to your comp uter an d p eriphera ls. Before

turning on you r computer and peripherals, review

the following section, Configuring the Host Adapter. It

may be necessary to configure th e host ad apter.

Configuring the Host Adapter

The AHA-2940Ultra/ 2940Ultra Wide includ es the

onboard, m enu-driven SCSISelectconfigur ation util-

ity, wh ich allows you to change host ad apter settings

without opening the compu ter or handling the

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board. SCSISelectalso contains SCSI disk utilities

that let you low -level format or v erify the d isk media

of your SCSI hard d isk drives.

SCSISelectDefault SettingsThe AHA-2940Ultra/ 2940Ultra Wide has the defaultsettings shown in th e table on the following page.

The default settings are app ropriate for most PCI

systems. If you d o not need to change any of the

default settings, there is no need to run SCSISelect.

Your h ost adap ter is ready for operation and you can

proceed toInstalling Device Drivers on page 10.

For situations where you might wan t or need to

change the settings, see the descriptions of each set-

ting in the u sers guid e. If you need to chan ge any of

the defau lt settings, or if you w ould like to format or

verify a disk, see Starting the SCSISelect Utility on

page 9 to start the u tility.

SCSI Bus Interface Definitions Default

Host Adapter SCSI ID 7

SCSI Parity Checking Enabled

Host Adapter SCSI Termination Automatic

Boot Device Options Default

Boot SCSI ID 0

Boot LUN Number1 0

SCSI Device Configuration Default

Maximum Sync Transfer Rate 20.0 MBytes/sec2

40.0 MBytes/sec3

Enable Disconnection Yes (Enabled)Initiate Wide Negotiation3 Yes (Enabled)

Send Start Unit Command4 Yes (Enabled)

Enable Write Back Cache N/C (No change)

BIOS Multiple LUN Support4 No (Disabled)

Include in BIOS Scan Yes (Enabled)

Advanced Configuration Options Default

Plug and Play SCAM Support Disabled

Reset SCSI Bus at IC Initialization Enabled

Extended BIOS Translation for DOS Drives >1 GByte

Enabled

Verbose/Silent Mode Verbose

Host Adapter BIOS (Configuration Utilityreserves BIOS space)

Enabled

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Starting the SCSISelectUtilityYou can start the SCSISelectutility by pressing Ctrl-A

when the following promp t appears at boot time:

Press for SCSISelect (TM) Utility!

The first menu th at app ears displays the optionsConfigure/ View H ost Adap ter Settings and SCSI

Disk Ut ilities.

Using SCSISelectMenusSCSISelectuses m enu s to list options you can select.

To select an option, u se the an d keys to move the

cursor to the option, then p ress Enter.

In some cases, selecting an option d isplays another

menu . You can return to the previous menu at any

time by pressing Esc. To restore the or igina l SCSISelect

default values, press F6. To toggle the disp lay

between color and monochrome m odes, press F5 (this

feature may not work on some kinds of monitors).

Exiting SCSISelectTo exit SCSISelect, press Esc un til a message prompts

you to exit (if you changed an y AH A-2940Ultra/

2940Ultra Wide settings, you are promp ted to save

the changes before you exit). At the p romp t, select

Yes to exit, then p ress any key to reboot the com-

pu ter. Any chan ges you made in SCSISelect take

effect after the compu ter boots.

Using the SCSI Disk UtilitiesTo access the SCSI disk ut ilities, select the SCSI Disk

Utilities option from the m enu that app ears after start-ing SCSISelect. Once the op tion is selected, SCSISelect

Support Removable Disks Under BIOS asFixed Disks4

Boot only

Display Message During BIOSInitialization4

Enabled

BIOS Support for Bootable CD-ROMs4 Enabled

BIOS Support for Int13 Extensions4 Enabled

1 Setting is valid only if Multiple LUN Support is enabled2 For AHA-2940Ultraonly3 For AHA-2940UltraWide only4 Settings are valid only if host adapter BIOS is enabled

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immed iately scans the SCSI bus an d d isplays a list of

all SCSI IDs and the d evices assigned to each ID.

When you select a sp ecific ID and device, a small

menu app ears, displaying the options Format Diskand Verify Disk Media.

s Format D isk This utility allows you to perform

a low-level format on a ha rd d isk drive. Most

SCSI disk d evices are p reformatted at the factory

and do not n eed to be formatted again. The

Adaptec Format Disk utility is compa tible with

the vast m ajority of SCSI disk d rives.

s Verify Disk MediaThis utility allows you to

scan the med ia of a hard disk d rive for defects. If

the ut ility finds bad blocks on the med ia, it

prom pts you to reassign them; if you select yes,

those blocks are no longer u sed. You can p ress Escat any time to abort th e utility.

Installing Device Drivers

Some op erating systems embed (include) the

AHA-2940Ultra/ 2940UltraWide d evice driver as p art

of their installation software. These drivers work fine

with you r AH A-2940Ultra/ 2940Ultra Wide; how ever,

the most recent version of the d river should be

installed in order for your AHA-2940Ultra/ 2940Ultra

Wide to perform at its optimu m level.

If you purchased your AHA-2940Ultra/ 2940UltraWide in a kit, the kit includ es the latest Adap tec

EZ-SCSI and Adaptec 7800 Family Manager Set

software.

s Adaptec EZ-SCSIallows you to in stall

software dr ivers for DOS, Wind ows 3.x, and

Windows 95/ 98 and includes several additional

utilities. Refer to the EZ-SCSI docum entation for

more information.

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s Adaptec 7800 Family Manager Setallows you

to install software d rivers for NetWare, OS/ 2,

Window s 95/ 98, Windows N T, and UN IX. Refer

to the 7800 Family Manager Set Users Guide.

Contact Ad aptec if you need to ord er EZ-SCSI or the

7800 Family Manager Set.

Troubleshooting Checklist

If you h ave a problem d ur ing installation, check

these items first:

s Have you installed the host adap ter into a PCI

Rev 2.0 compliant comp uter?

s Are all SCSI devices pow ered?

s Are all SCSI bus cables and pow er cables properlyconnected? Is pin 1 oriented correctly?

s Does the host ad apter an d all devices on the SCSI

bus h ave un ique SCSI IDs?

s Are all devices on the SCSI bus term inated

properly?

s Does your system CMOS setup require you to

enable PCI bus p aram eters? If so, see your

computers documentation. Check that IRQ

channel assignm ent, board, and BIOS settings

have been made.

s Did you install your host adap ter in a bus m asterPCI slot? Refer to your comp uter s docum enta-

tion or try another slot.

Computer Will Not Boot from a SCSI Disk DriveIf both SCSI and non-SCSI disk dr ives are installed,

then th e non-SCSI disk drive w ill be the defau lt boot

device. Most newer systems allow for booting from

SCSI dev ices. Check your system man ual for instruc-

tions on how to set SCSI as the defau lt boot device.

If the system has on ly SCSI disk d rives, do the

following:

1 Make sure the drive type in your computer sCMOS setup is set to No Drives Installed.

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2 Make su re the boot hard disk SCSI ID corre-sponds to the Boot Target ID setting in SCSISelect

(see page 8). The SCSI ID is norm ally set w ith

jumpers or switches on the drive.

3 If this does no t solve the problem, back up all dataon the SCSI hard d isk and p erform a low-level

format w ith the SCSISelectFormat Diskoption.See the MS-DOS docum entation for instru ctions

on partitioning the disk after formatting.

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FCC Compliance StatementThis equipment h as been tested and found to comply with the limits for a

Class B digital d evice, pursua nt to Pa rt 15 of the FCC rules. These limits are

designed to provide reasonable protection against harmful interference in

residential installations. This equipment generates, uses, and can rad iate

radio frequency energy, and if not installed and used in accordance with th einstructions, may cause harmful interference to rad io communications.

However, there is no guarantee that interference will not occur in a p articu-

lar installation.

If this equipment does cause interference to r adio or television equipment

reception, which can be determined by tu rning the equipm ent off and on,

the user is encouraged to try to correct the interference by one or more of the

following measures:

Reorient or relocate the receiving antenna

Move the equipment away from the receiver

Plug the equipment into an outlet on a circuit different from that to

which the receiver is powered

If necessary, the user should consult the dealer or an experienced radio/

television technician for additional suggestions

CAUTION: Only equipment certified to comply with Class B (computer

input/ output devices, terminals, printers, etc.) should be attached to this

equipment, and must have shielded interface cables.

Finally, any changes or modifications to the equipment by the user notexpressly approved by th e grantee or manu facturer could void the user's

authority to operate such equipment.

Each host ad apter is equipped with an FCC compliance label which shows

only the FCC Identification nu mber. The full text of the associated label

follows:

This device complies with p art 15 of the FCC rules. Operation is su bject to

the following two conditions: (1) this device may not cause harmful interfer-

ence and (2) this device must accept any interference received, includinginterference that may cause undesired operation.

Adaptec, Inc.691 South Milpitas Blvd .Milpitas, CA 95035

1999, Adap tec, Inc. All rights reserved. Ad aptec, the Ad apteclogo, AH A, EZ-SCSI, and SCSISelectare trademarks of Ad aptec,Inc. wh ich may be registered in some jurisdictions. Wind ows NT

is a trademark, and Windows and Windows 95/ 98 are registeredtradem arks, of Microsoft Corpor ation in the U.S. and other coun -tries used und er license. All other tradem arks are ow ned by their

respective owners.

Printed in SingaporeStock No.: 512306-00, Rev. A RAC 4/ 99

Information subject to chan ge withou t notice.

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R

AHA-2940Ultra/2940Ultra WidePCI-to-UltraSCSI Host Adapterwith SCSISelect

Installation Guide

AHA-2940Ultra/2940Ultra WidePCI-to-UltraSCSI Host Adapterwith SCSISelect /Edition 2.20

Installation Guide