Installation guide

ManualsBrandsAdaptec ManualsAdapterAHA-3940W

Document Title: AHA-3940/3940W Installation Guide

Part Number: 510595-00, Rev. A

Print Spec Number: 492699-00

Current Date: 8/25/94 ECN Date:08/30/94

Getting Started

This Installation Guide tells you how to install and con-

figure AHA

-3940/3940W SCSI-to-PCI host adapters.

These host adapters have two SCSI channels which

operate like two independent host adapters. AHA-3940/

3940W host adapters are designed for computers with

5-volt 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 PCI 2.0

compliant, and the motherboard BIOS must support

PCI-to-PCI Bridges (PPB).

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

devices on each 8-bit SCSI channel. The AHA-3940W

supports up to fifteen 16-bit or 8-bit SCSI devices on

each 16-bit Wide SCSI channel; up to seven of these

can be 8-bit devices. Installation procedures are the

same for both host adapter models.

Board Layout

The diagrams and the following table show the

major AHA-3940 and AHA-3940W components.

J1 J2

AHA-3940

J1 J2

AHA-3940W

Summary of content (12 pages)

PAGE 1
Getting Started This Installation Guide tells you how to install and configure AHA®-3940/3940W SCSI-to-PCI host adapters. These host adapters have two SCSI channels which operate like two independent host adapters. AHA-3940/ 3940W host adapters are designed for computers with 5-volt 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 PCI 2.0 compliant, and the motherboard BIOS must support PCI-to-PCI Bridges (PPB).
PAGE 2
Location Description J2 Internal SCSI connector - Channel A1 Internal SCSI connector - Channel B1 J3 External LED connector J4 External SCSI connector - Channel A1 J5 Multiple computer termination jumper - Channel B2 Multiple computer termination jumper - Channel A2 J1 J6 1 This is a 68-pin connector on the AHA-3940W and a 50-pin connector on the AHA-3940. 2 See Termination in Multiple Computer Environments on page 5.
PAGE 3
4 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 chassis cover. 1 Remove the cover from the computer case. 2 Locate an unused 5-volt PCI expansion slot that supports bus mastering. Be sure that 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.
PAGE 4
5 Connecting SCSI Devices Caution: AHA-3940/3940W host adapters support only single-ended SCSI devices. Do not connect differential SCSI devices, or the host adapter may be damaged. Read the 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.
PAGE 5
Terminating the Host Adapter Host adapter termination is controlled by the SCSISelect utility, if only one computer is connected to the host adapter. Termination for both Channels A and B is Enabled by default. You must disable host adapter termination for SCSI Channel A if you attach SCSI devices to both the internal and external SCSI connectors of Channel A.
PAGE 6
■ The SCSI IDs on one SCSI channel do not interfere 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. 6 Completing the Installation 1 Put the chassis cover back on the computer, following the directions in the documentation. 2 Be sure all power switches are OFF, then reconnect power cables to your computer. 3 Turn ON the power for the computer and the peripheral device(s).
PAGE 7
Use the arrow (↑↓) and Enter keys to make selections in SCSISelect. 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 Host Adapter Settings menu, press Esc and select No when asked if you want to save the changes. The first SCSISelect screen allows you to choose SCSI Channel A or Channel B. You can only configure one SCSI channel at a time.
PAGE 8
■ 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. 8 Operating System Software DOS/Windows Under MS-DOS 5.0 or above, you can install up to eight hard disk drives (either SCSI or non-SCSI) in your computer without using additional software. Older versions of DOS support up to two hard disk drives. You can make the host adapter treat removablemedia drives as hard disk drives.
PAGE 9
Other Operating Systems AHA-3940/3940W host adapters support DOS, Novell® NetWare®, OS/2®, Windows NT, SCO® and Novell Unixware® operating systems. Contact Adaptec or your operating system vendor for information on the current schedule for operating system support. 9 Troubleshooting Checklist If you have a problem during installation, check these items first: ■ Is your computer PCI 2.
PAGE 10
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: 1 Make sure your computer’s CMOS Setup is set to No Drives Installed, which is required for SCSI host adapters. 2 Make sure the SCSI ID of the boot hard disk is 0 and that the boot partition is active. (The SCSI ID is usually set with jumpers or switches on the drive.
PAGE 11
FCC Compliance Statement NOTE: 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 residential installations. This equipment generates, uses, and can radiate radio frequency energy, and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
PAGE 12
Installation Guide AHA-3940/3940W MultiChannel SCSI-to-PCI Host Adapters with SCSISelect Utility R AA AAAA AA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAAA AAAAAAA AA AHA-3940/3940W Installation Guide AA AA AA AA AA Part Number: 510595-00, Rev.