Adaptec 3940AUW User manual

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
R
Installation Guide
AHA-3940AU/AUW
MultiChannel PCI-to-UltraSCSI Host Adapters
with SCSISelect Utility

1
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.
1
2
J3
J4
J6 J1
J2
J5
AHA-3940AU

2
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
J4
J8
J6
AHA-3940AUW J3
J2

3
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
3

4
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!
4

5
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.
5

6
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

7
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.
6

8
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,
7

9
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.
8

10
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
You can make the host adapter treat removable-
media drives as hard disk drives. To do this, run the
SCSISelect utility, select Advanced Configuration
Options, and set the Support Removable Disks
Under BIOS as Fixed Disks option to All Disks.
Caution: If you use this setting, you cannot
remove media while your computer is ON.
You will need the the Adaptec 7800 Family Manager
Set, which is included in the kitted version of the
AHA-3940AU/AUW, to do the following:
■Use devices other than hard disk drives, such as
SCSI tape drives, CD-ROM drives, scanners, etc.
■Remove and insert CD-ROM discs and other
removable media while your computer is running
■Support more than eight hard disk drives under
MS-DOS 5.0 or later
Adaptec EZ-SCSISoftware
Adaptec EZ-SCSI software for DOS, Windows 3.x,
Windows 95, and Windows NT™is included in the
kitted version of the AHA-3940AU/AUW. Use the
menu-driven software to install drivers and config-
ure your DOS/Windows operating system automati-
cally.
Other Operating Environments
AHA-3940AU/AUW host adapters support
Novell NetWare, OS/2, SCO Unix, and SCO
UnixWare operating systems. The Adaptec 7800
Family Manager Set is included in the kitted version
so that you can installthe appropriate driver for your
system. Refer to the Adaptec 7800 Family Manager Set
User’s Guide (included) for detailed information.
Troubleshooting Checklist
If you have a problem during installation, check
these items first:
■Is your computer compliant with PCI 2.0 or
higher, and does the motherboard BIOS support
9

11
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
PCI-to-PCI Bridges (PPB)? If not, contact your
computer manufacturer for a BIOS upgrade.
■Are all SCSI devices powered?
■Are all SCSI bus cables and power cables properly
connected?
■Does the host adapter and each device on each
SCSI bus channel have a unique SCSI ID?
■Are all devices on the SCSI bus terminated
properly?
■Does your system CMOS
Setup require you to
enable PCI bus parameters? If so, see your
computer documentation. Confirm the IRQ chan-
nel assignment.
■Is the host adapter installed in a PCI slot that sup-
ports bus mastering? Refer to your computer doc-
umentation or move the host adapter to a
different PCI slot.
Computer Will Not Boot from a SCSI Disk Drive
If both SCSI and non-SCSI disk drives are installed in
your computer, the non-SCSI drive is always the boot
device. If the computer has only SCSI disk drives,
check the following:
1Make sure your computer’s CMOS
Setup is set to
No Drives Installed.
2Make sure the boot partition of the boot hard disk
is active. (The SCSI ID is usually set with jumpers
or switches on the drive.)
3Partition the disk. Follow the instructions in the
documentation for the operating system you are
using.
If this does not solve the problem, see the trouble-
shooting information in the User’s Guide. As a last
resort, back up all data on the SCSI hard disk and per-
form a low-level format with the SCSISelect Format
Disk
option.

12
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
Adaptec Technical Support and Services
If you have questions about installing or using your Adaptec
product, check this document first—you will find answers to most
of your questions here. If you need further assistance, please
contact us. We offer the following support and information
services:
Electronic Support
Technical information, including product literature, answers to
commonly asked questions, information on software upgrades
and other topics is available electronically through the following:
■Adaptec World Wide Web (WWW) site at http://
www.adaptec.com.
■File Transfer Protocol (FTP) server at ftp.adaptec.com.
■Adaptec USA Bulletin Board Service (BBS) at 408-945-7727;
supports up to 28,800 bps (bits per second), 8 data bits, 1 stop
bit, no parity. No product literature is available on the
Adaptec BBS.
■Interactive Fax System at 408-957-7150; available 24 hours a
day, 7 days a week.
Technical and Product Support
■For technical support and information about many of
Adaptec’s electronic support services, call 800-959-7274 or
408-945-2550, 24 hours a day, 7 days a week.
■To use the Adaptec Interactive Support System, call
800-959-7274 or 408-945-2550, 24 hours a day, 7 days a week.
The system prompts you with questions regarding your
problem and then provides step-by-step troubleshooting
instructions.
■To speak with a product support representative, call
408-934-7274, M–F, 6:00 A.M. to 5:00 P.M., Pacific Time. After
hours, on weekends, and on holidays, product support is also
available for a fee at 800-416-8066.
Sales and Ordering Information
■For sales information, call 800-959-7274 or 408-945-2550, M–F,
6:00 A.M. to 5:00 P.M., Pacific Time.
■To order Adaptec software and SCSI cables, call 800-442-7274
or 408-957-7274, M–F, 6:00 A.M. to 5:00 P.M., Pacific Time.
■To request additional documentation for Adaptec products,
call 800-934-2766 or 510-732-3829, M–F, 6:00 A.M. to 5:00 P.M.,
Pacific Time.

13
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
Federal Communications Commission Radio Frequency
Interference Statement
WARNING: Changes or modifications to this unit not expressly approved
by the party responsible for compliance could void the user’s authority to
operate the equipment.
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate
radio frequency energy, and if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communica-
tions. However, there is no guarantee that interference will not occur in a
particular installation. However, if this equipment does cause interference
to radio or television equipment reception, which can be determined by
turning the equipment 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.
• Increase the separation between equipment and receiver.
• Connect the equipment to an outlet on a circuit different from that to
which the receiver is connected.
• Consult the dealer or an experienced radio/television technician for
help.
Use a shielded and properly grounded I/O cable and power cable to ensure
compliance of this unit to the specified limits of the rules.
This device complies with part 15 of the FCC rules. Operation is subject to
the following two conditions: (1) this device may not cause harmful interfer-
ence and (2) this device must accept any interference received, including
interference that may cause undesired operation.
Canadian Compliance Statement
This Class B digital apparatus meets all requirements of the Canadian Inter-
ference-Causing Equipment Regulations.
Cet appareil numérique de la classe B respecte toutes les exigences du
Règlement sur le matérial brouilleur du Canada.
Adaptec, Inc.
691 South Milpitas Blvd.
Milpitas, CA 95035
© 1997, Adaptec, Inc. All rights reserved. Adaptec, the Adaptec
logo, AHA, and EZ-SCSI are trademarks of Adaptec, Inc. which
may be registered in some jurisdictions. Windows NT is a trade-
mark, and Windows and Windows 95 are registered trademarks
of Microsoft Corporation used under license. All other trademarks
used are owned by their respective owners.
Printed in Singapore
Stock No.: 511418-00, Rev. A MR 3/97
Information subject to change without notice.
Adaptec, Inc.
Tested To Comply
With FCC Standards
FOR HOME OR OFFICE USE
AHA-3940AU
AHA-3940AUW