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AH A-2940/ 2940WPCI-to-Fast SCSI Host Adapterwith SCSISelect

Installation Guide

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Introduction

The Ad aptec AH A

-2940 an d AH A-2940W PCI-to-Fast SCSI host adap ters provide a powerfu l m ulti-tasking interface between you r compu ters PCI busand SCSI d evices (d isk d rives, CD-ROM d rives,scann ers, tape backups, removable m ed ia d rives,etc.). Collectively, both host ad ap ters are r eferred toas the AH A-2940/ 2940W. The follow ing figu resshow the m ajor com ponents on the AH A-2940 andAHA-2940W.

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Host Adapter BIOS

50-pin 8-bit InternalSCSI Connector

Host Adapter LED

AIC-78xx SCSI Protocol Chip

50-pin 8-bitExternal

SCSIConnector

LED Connector

Adaptec AHA-2940

Host Adapter BIOS

50-pin 8-bit Internal SCSI ConnectorHostAdapterLED

AIC-78xx SCSI Protocol Chip

68-pin 16-bitExternal

SCSIConnector

LED Connector

68-pin 16-bitInternal SCSI

Connector

Adaptec AHA-2940W

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s If th e AHA-2940 detects that a cable is connectedto both its internal and extern al SCSI connector,

then it d isables its term inator s (th e AH A-2940 liesbetw een the end s of the SCSI bu s).

We recomm end that you leave the AHA-2940 set toits defau lt setting of Au tom atic. If you want to m an-ually en able or d isable the AH A-2940 term inationsetting, see Configuring the Host A dapter on p age 8.

Terminating the AHA-2940WTerm inat ion on the AH A-2940W itself is also con -trolled by softw are com m and s via the SCSI Select util-ity. The d efau lt setting is set to Low ON/High ON .

This means that term ination is enabled for both thelow and the high bytes of the 16-bit Wide SCSI bu s.The low byte con trols the 8-bit SCSI; the low andhigh bytes together con trol 16-bit Wid e SCSI.

If you are using both internal connectors on th e

AH A-2940W, or an internal connector and the exter-nal connector, you m ust change the term ination set-ting from the d efau lt setting. The follow ing tablelists the term ination configu rations.

Terminating SCSI DevicesRead the d evices d ocum entation to d eterm ine h owto enable or d isable termination on you r p articu larSCSI d evice(s). On m ost internal SCSI d evices th e ter-mination setting is controlled by a jumper or asw itch . On other internal SCSI devices you mu stphysically rem ove or install resistor mod ule(s). Onmost external SCSI dev ices, a term inating p lug (aresistor p ack embed d ed in a sm all plug) is installedor removed to control termination.

AHA-2940W

TerminationDevices Connected to AHA-2940W 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 con nect u p to a total of seven internal andexternal 8-bit SCSI devices to the AH A-2940, and upto 15 devices (seven 8-bit internal and eight Wide (16-bit) internal or external SCSI devices, or 15 Wid e inter-nal and external SCSI devices) to the AH A-2940W.

Choosing SCSI CablesThe cables requ ired to connect SCSI d evices ared eterm ined by the type of d evices you are installing,as described in the follow ing table.

If you pu rchased you r AH A-2940/ 2940W in anAd aptec kit, the kit includes an intern al SCSI cablethat allow s you to connect u p to two internal SCSId evices (th e AH A-2940 kit includ es a 50-p in internalSCSI cable, and the AH A-2940W k it includes a68-p in internal SCSI cable). If you are connectingmore than tw o internal SCSI d evices, you m ustobtain an internal SCSI cable w ith enough connec-

tors to accom mod ate all of you r d evices.Ad aptec sells h igh-qu ality in ternal and extern al SCSIcables. If you r reseller does not s tock these cables,call Adaptec d irectly at the nu m ber for ord eringAd aptec softw are and cables listed on p age 12.

Wh en Fast SCSI devices are connected to the hostad ap ter, the total length of all cables (internal andexternal) must not exceed 3 m eters (9.8 ft.) to ensu rereliable op eration . If no Fast SCSI d evices are con-nected , the total length of all cables m ust not exceed

6 m eters (19.7 ft). See you r d evices d ocum entat ionto d eterm ine if it is a Fast SCSI device.

SCSI Device Type AHA-2940 AHA-2940W

8-bit Internal SCSI 50-pin internalSCSI cable

50-pin internalSCSI cable

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

16-bit Internal Wide SCSI 68-pin internalSCSI cable

16-bit External Wide SCSI 68-pin externalSCSI cable

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Connecting Internal SCSI DevicesIf you are connecting internal SCSI d evices, m ake

sure you have an in ternal SCSI cable w ith enou ghconnectors to accom m od ate all of you r d evices.

1 Prepare each SCSI device for installation ; config-u re the d evice SCSI ID and term inators (term inatethe last internal device attached to the cable). Forinstru ctions, see the d evices d ocum entation aswell as SCSI Configuration Guidelines on p age 2.

2 Install the SCSI d evice in your com puter. Refer toyour com pu ter and d evice docum entation forinstructions.

3 Plug th e connector at one end of the internal SCSIcable into the host ad ap ter s internal SCSIconnector.

Make sure the colored stripe on one sid e of thecable is aligned w ith p in-1 of the host ad apter s

connector. Pin-1 of the connector is usu ally d esig-nated by a sm all triangle ( v ), or a 1 on theconnector.

4 Plug the rem aining connectors on the cable intothe connectors on the backs of the d evices.

Make su re the colored stripe on the cable isaligned w ith p in-1 of the d evices connector.

5 Connect a DC pow er cable (from you r com-pu ter s pow er sup p ly) to the pow er conn ector onthe SCSI device.

Connecting External SCSI DevicesIf you are connecting external SCSI devices to yourhost adap ter, you m ust obtain an external SCSI cablefor each external d evice you install.

1 Prepare each SCSI device for installation ; config-u re the SCSI ID and attach a term inating p lug intothe last external d evice. For instru ctions, see thedevices docum entation as w ell as SCSI Configura-tion Guidelines on p age 2.

2 Plug th e connector at one end of the external SCSIcable into the host ad ap ter s external SCSIconnector.

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For situations w here you might w ant or n eed tochan ge the settings, see the d escrip tions of each set-

ting in the u sers gu ide. If you need to change any of the defau lt settings, or if you w ou ld like to form at orver ify a d isk, see Starting the SCSISelect Utility onp age 9 to star t the u tility.

1Applies to AHA-2940 only2 Applies to AHA-2940W only

3 Setting is valid only if Multiple LUN Support is enabled4 Settings are valid only if host adapter BIOS is enabled.

Basic Host Adapter Settings Default

Host Adapter SCSI ID 7

SCSI Parity Checking Enabled

Host Adapter SCSI Termination Automatic1;Low ON/ High ON2

Boot Device Settings DefaultBoot Target ID 0

Boot LUN Number3 0

SCSI Device Settings Default

Initiate Sync Negotiation Yes (Enabled)

Maximum Sync Transfer Rate 10 MBytes/secEnable Disconnection Yes (Enabled)

Initiate Wide Negotiation2 Yes (Enabled)

Send Start Unit SCSI Command4 No (Disabled)

Advanced Host Adapter Settings Default

Plug and Play SCAM Support DisabledHost Adapter BIOS Enabled

Support Removable Disks Under BIOS as Fixed Disks4 Boot only

Extended BIOS Translation for DOS Drives > 1 GByte4 Enabled

Display Message During BIOS Initialization4 Enabled

Multiple LUN Support4 Disabled

BIOS Support for More Than 2 Drives4 Enabled

BIOS Support for Bootable CD-ROM4 Enabled

BIOS Support for Int 13 Extensions4 Enabled

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Starting the SCSISelect UtilityYou can start the SCSI Select u tility by pressing Ctrl-A

w hen the follow ing prom pt app ears at boot time:Press for SCSISelect (TM) Utility!

The first menu that appears d isplays the op tionsConfigure/ View Host Ad apter Settings and SCSIDisk Utilities.

Using SCSISelect MenusSCSI Select uses menus to list op tions you can select.To select an op tion, use the and keys to m ove thecursor to the option, then p ress Enter .

In som e cases, selecting an option d isplays anothermenu . You can retu rn to the previous m enu at anytime by pressing Esc . To restore the original SCSI Select d efau lt values, p ress F6 . To toggle the d isplaybetw een color and m onochrom e m odes, p ress F5 (thisfeature may not w ork on some kind s of monitors).

Exiting SCSISelect To exit SCSI Select , p ress Esc u ntil a m essage prom p tsyou to exit (if you changed any AH A-2940/ 2940Wsettings, you are prom pted to save the changesbefore you exit). At th e prom pt, select Yes to exit,then p ress any key to reboot the com puter. Anychan ges you m ad e in SCSI Select take effect after thecom puter boots.

Using the SCSI Disk Utilities

To access the SCSI disk u tilities, select the SCSI DiskUtilities option from the menu that app ears after start-ing SCSI Select . Once the op tion is selected , SCSI Select im mediately scans the SCSI bus and d isp lays a list of all SCSI IDs and the d evices assigned to each ID.

Wh en you select a specific ID and device, a sm allmenu appears, d isp laying the op tions Form at Disk and Verify Disk Med ia.

s Format D isk This u tility allow s you to per forma low -level form at on a hard d isk d rive. MostSCSI d isk d evices are preform atted at the factoryand do not need to be form atted again. TheAd aptec Form at Disk ut ility is com patible w iththe vast m ajority of SCSI d isk d rives.

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s Verify D isk Media This ut ility allow s you toscan the m ed ia of a h ard d isk d rive for d efects. If

the ut ility find s bad blocks on the m ed ia, itp rom pts you to reassign them; if you select yes,those blocks are no longer u sed . You can p ress Esc at an y tim e to abort the ut ility.

Installing Device DriversSom e operating systems em bed (includ e) theAH A-2940/ 2940W d evice driver as p art of their instal-lation software. These d rivers work fine w ith yourAHA-2940/ 2940W; how ever, the m ost recent version

of the d river shou ld be installed in ord er for you rAH A-2940/ 2940W to perform at its optim um level.

If you p u rchased you r AH A-2940/ 2940W in a kit, thekit inclu d es the latest Ad ap tec EZ-SCSI and Ad ap tec7800 Family Man ager Set softw are.

s Adaptec EZ-SCSI allow s you to install softw aredrivers for DOS/ Wind ow s and several add itionalu tilities. Refer to the EZ -SCSI Users Guide .

s Adaptec 7800 Family Manager Set allows youto install softw are d rivers for N etWare, OS/ 2,

Window s NT, and UN IX. Refer to the 7800 Family Manager Set Users Guide .

If you need to ord er EZ-SCSI or the 7800 Fam ilyManager Set, call the number for ord ering Ad aptecsoftw are and cables listed on page 12.

Troubleshooting ChecklistIf you have a p roblem d uring installation , check these items first :

s

Have you installed the host ad apter into a PCIRev 2.0 com pliant com pu ter?

s Are all SCSI d evices pow ered?

s Are all SCSI bus cables and pow er cables p roperlyconnected ? Is p in 1 oriented correctly?

s Does the host adap ter and all devices on th e SCSIbu s have un ique SCSI IDs?

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Adaptec Customer Support

If you have questions abou t installing or using you r Ad aptecprodu ct, check this gu id e firstyou w ill find answers to most of you r qu estions here. If you need fu rther assistance, please con tactus. We offer the following su pport an d in form ation services:

s For technical sup port (answ ers to techn ical qu estions, informa-tion abou t the Ad aptec BBS, FTP an d WWW Servers, andaccess to the In teractive Fax system ), call 800-959-SCSI (7274)

or 408-945-2550, 24 hou rs a d ay, 7 days a w eek. To sp eak w ith aprod uct sup port rep resentative, call 408-934-SCSI (7274),MF: 6:00 a.m. to 5:00 p.m., Pacific Time.

s To ord er Ad ap tec softw are and SCSI cables, call 800-442-SCSI(7274) or 408-957-SCSI (7274), MF: 6:00 a.m . to 5:00 p.m.,Pacific Time.

s Th e Ad ap tec Electron ic Bu lletin Board Service (BBS) provides

in form ation on software up grad es, answers to common qu es-tions, and oth er top ics. The BBS is available 24 hou rs a d ay,7 days a w eek, at 408-945-7727; 1200/ 2400/ 9600/ 14,400/ 28,800baud , 8 data bits, 1 stop bit, no p arity.

s Th e Adap tec FTP and WWW Servers p rovid e inform ation onsoftware upgrad es, product literatu re, answers to comm onqu estion s, an d oth er topics. The FTP and WWW Server s are

available from the Internet 24 hours a d ay, 7 days a week, atftp.adaptec.com and http://www.adaptec.com .s Th e Adap tec Interactive Fax system p rovid es answ ers to com -

mon qu estions, p roduct literature, and cu rrent in form ationabou t Ad aptec p rod ucts and services. The Ad aptec In teractiveFax system is availab le 23 hou rs a d ay, 7 d ays a w eek. The Faxsystem is ou t of service 1 hour each d ay. You can call this ser-

vice d irectly at 408-957-7150.s To requ est add ition al d ocumentation for Adap tec p rod ucts,

call 800-934-2766 or 510-732-3829, MF: 6:00 a.m . to 5:00 p .m .,Pacific Time.

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FCC Compliance StatementN OTE: This equipment has been tested and fou nd to comp ly with the limitsfor a Class B digital device, pu rsuant t o Par t 15 of the FCC ru les. These lim-

its are d esigned to p rovide reasonable p rotection against h armful interfer-ence in residential installations. This equ ip ment generates, uses, and canrad iate rad io frequ ency energy, and if not installed and u sed in accord ancewith th e instru ctions, may cause harm fu l interference to rad io comm u nica-tions. H owever, there is no gu aran tee th at inter ference w ill not occu r in aparticular installation.

If this equ ip ment d oes cau se interference to rad io or television equ ipm entrecep tion, w hich can be determ ined by tu rning the equ ipm ent off and on,

the u ser is encour aged to try to correct the int erference by one or more of thefollowing measures:

Reorient or relocate the receiving antenna Move the equipment away from the receiver Plug the equipm ent into an outlet on a circuit different from that to

w hich the receiver is pow ered If necessary, the user should consult the dealer or an experienced radio/

television techn ician for add itional sug gestionsCAUTION : Only equ ip ment certified to comply with Class B (compu terinp ut/ ou tpu t devices, term inals, pr inters, etc.) should be attached to thisequ ip ment , and mu st have shielded in terface cables.

Finally, any changes or mod ifications to the equ ip ment by the u ser notexpressly ap proved by the grantee or m anu fact urer could void the u ser'sauthority to operate such equipm ent.

Each host ad apter is equ ip ped w ith an FCC comp liance label wh ich show s

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

This d evice complies w ith p art 15 of th e FCC rules. Operat ion is subject tothe follow ing tw o cond itions: (1) this d evice may not cause harmful interfer-ence and (2) this device mu st accept any int erference received, includ inginterference that may cause und esired op eration.

Adaptec, Inc.691 South M ilp itas Blvd .Milpitas, CA 95035

Cop yrigh t 1995, Ad ap tec, Inc. All righ ts reserved . Adap tec, theAd ap tec logo, AH A, EZ-SCSI, and SCSI Select are trad emarks of Ad ap tec, Inc. which m ay be registered in some ju risd ictions . Allother trad emarks are ow ned by their respective own ers.

Printed in Singap oreStock N o.: 510881-00, Rev. A RQ 7/ 95Inform ation subject to chan ge w ithou t n otice.