Adaptec 39320-R Manuale utente

INSTALLATION GUIDE

ADAPTEC SCSI CARD 39320

ASC-39320 IG.fm Page 14 Monday, August 12, 2002 9:36 AM

The Adaptec SCSI Card 39320 enables you to connect up to 30

SCSI devices—such as very large arrays of high-performance

hard disk drives, external storage subsystems, Ultra320/160 hard

disk drives, scanners, and CD-ROM drives—to any Intel-based

computer with 64- or 32-bit PCI/PCI-X expansion slots.

The Adaptec SCSI Card 39320 has two independent SCSI

channels with a maximum throughput of 320 MB/sec. SCSI

Channel A (marked CH A on the card) has one internal

68-pin Low Voltage Differential/Single-Ended (LVD/SE)

connector. SCSI Channel B (marked CH B on the card) has one

internal 68-pin LVD/SE connector and one external 68-pin

LVD/SE connector.

You can connect Ultra320/160 and Ultra2 SCSI devices to the

68-pin LVD connectors on both SCSI channels. When connecting

these newer devices along with older legacy SCSI devices,

Adaptec recommends that you dedicate them as separate

channels. See Support for Older SCSI Devices on page 2 for more

information.

Although the Adaptec SCSI Card 39320 is a 64-bit PCI/PCI-X

card, it also works in a 32-bit PCI slot. When installed in a 32-bit

PCI slot, the card automatically runs in the slower 32-bit mode.

This installation guide explains how to:

•Install the Adaptec SCSI Card 39320

•Set up SCSI devices

•Connect SCSI devices

INTRODUCTION

68-pin external

LVD/SE connector

Channel B

68-pin internal LVD/SE

connector Channel B 68-pin internal LVD/SE

connector Channel A

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Support for Older SCSI Devices

If you have single-ended Ultra SCSI and earlier SCSI devices,

Adaptec recommends that you connect them together on one

channel of the Adaptec SCSI Card 39320 and that you connect

newer Ultra320/160 SCSI and Ultra2 devices to the other

channel. This allows the Adaptec SCSI Card 39320 to dedicate

one SCSI channel to support a slower transfer rate for the Ultra

(legacy) devices, while the second SCSI channel can support LVD

devices in Ultra320, Ultra 160, or Ultra2 speeds. It also allows you

to use longer cable lengths for the newer SCSI devices.

Discharge any static electricity build-up before handling your

SCSI card by touching a grounded metal object (like the exposed

metal parts on the back of your computer).

If you connect Wide Ultra/Ultra SCSI devices to the

same SCSI channel as Ultra320/160 and Ultra2 SCSI devices,

the data transfer rate for the Ultra320/160 and Ultra2 SCSI

devices will drop to Ultra SCSI performance levels. To achieve

maximum data transfer rates for the newer SCSI devices, be

sure to connect them on their own SCSI channel.

NOTE

INSTALLING THE ADAPTEC SCSI CARD 39320

STEP 1

Turn OFF power to the computer and disconnect the

power cord.

WARNING

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After you turn off your computer and unplug the power cord,

remove the cover from the computer.

Locate an unused 64-bit PCI/PCI-X expansion slot and remove

the expansion slot cover. If the computer does not have a 64-bit

slot, you can install the card in a 32-bit PCI slot. The Adaptec

SCSI Card 39320 supports both 5V and 3.3V 64-bit slots. (The

expansion slot must be compliant with PCI Rev. 2.1 or PCI-X

Rev. 1.0 and must support Bus Mastering.) Save the slot cover

screw for use in Step 4.

Computers may have vertical or horizontal expansion slots. Refer

to your computer manual to locate the PCI slots. If your

computer is a tower model, lay it on its side to allow for easier

installation of the Adaptec SCSI Card 39320.

STEP 2

STEP 3

Be careful when inserting the Adaptec SCSI Card

39320 in a PCI slot. Some 32-bit slots will not accommodate it,

and the card may break if you force it into the slot.

Slot cover

screw

Expansion

slot cover 64-bit PCI slot

32-bit PCI slot

WARNING

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Insert the Adaptec SCSI Card 39320 in the 64-bit (or 32-bit) PCI or

PCI-X expansion slot; press down firmly until the card clicks into

place, then replace the slot cover screw. When installed properly,

the card should appear level with the expansion slot, as shown

below.

There are several things you may need to do to your SCSI devices

before you connect them to the Adaptec SCSI Card 39320:

•Check the SCSI IDs

•Set the termination

•Connect the power cables

Since setup can vary from device to device, always refer to the

device’s documentation for specific instructions.

Below are some guidelines for setting SCSI IDs and termination

on your devices.

Check the SCSI IDs

The Adaptec SCSI Card 39320 and each device you connect to it

must have a unique SCSI ID number ranging from 0 to 15 on each

channel. No two devices on the same SCSI channel can have the

same SCSI ID.

STEP 4

SETTING UPSCSI DEVICES

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The Adaptec SCSI Card 39320 is preset to ID 7 for each channel

and should not be changed. If you boot from a SCSI hard disk,

make sure the hard disk SCSI ID is set to 0. (Most SCSI hard disks

are preset to SCSI ID 0 at the factory.) The SCSI IDs for internal

devices are usually set with jumpers; SCSI IDs for external

devices are usually set with a switch on the back of the device.

Terminate the Ends

To ensure reliable communication on the SCSI bus, the device at

the end of each cable, or the end of the cable itself, must have a

terminator installed (or enabled). Terminators must be removed,

or termination must be disabled, on devices between the ends of

each cable.

You can connect a total of 30 SCSI devices to the Adaptec SCSI

Card 39320,with up to 15 devices on each SCSI channel. Before

connecting devices, be sure to review Setting Up SCSI Devices on

page 4.

Connecting Internal Ultra320/160 and Ultra2 Devices

A special 68-pin internal LVD cable is needed to connect internal

Ultra320/160 or Ultra2 SCSI devices. If your cables are not

marked, you can identify most LVD cables as having twisted

pairs ofthe flat ribbon cable between the device connectors. Some

cables are laminated so that they lay flat. Internal LVD cables

usually have a terminator built into the end of the cable.

When connecting Ultra320/160 or Ultra2 SCSI devices,

the SCSI bus must be terminated either on the end of the cable

(with a permanent terminator) or with a separate terminating

connector. Ultra SCSI and earlier single-ended devices can

terminate the bus directly from the device. If you use an Ultra

SCSI terminator on an LVD Ultra320/160 and Ultra2 SCSI bus,

the SCSI devices will not operate properly. For this reason be

sure that you have the necessary Ultra320/160 or Ultra2 cable

and terminator before installing the Ultra320/160 SCSI

devices.

NOTE

CONNECTING SCSI DEVICES

ASC-39320 IG.fm Page 5 Monday, August 12, 2002 9:36 AM

The Adaptec SCSI Card 39320 has two separate Ultra320/160

SCSI channels, as shown in the figure on page 1. Both channels

have an internal LVD/SE connector to which you can connect

internal SCSI devices.

Follow these steps to connect your internal Ultra320/160 and

Ultra2 devices:

Locate a 68-pin internal LVD SCSI cable, which may have either

twisted wires or flat wires, as shown here.

Adaptec recommends that you keep your Ultra320/160

and Ultra2 SCSI devices on a separate SCSI channel from your

Ultra SCSI devices. This allows the newer Ultra320/160 and

Ultra2 SCSI devices to transfer data at their maximum speed.

NOTE

STEP 1

Terminated end Nonterminated end

ASC-39320 IG.fm Page 6 Monday, August 12, 2002 9:36 AM

Plug the nonterminated end of the cable(s) to one of the internal

LVD/SE connector.

Plug the internal Ultra320/160 and Ultra2 SCSI devices to the

other cable connectors, starting with the connector at the

terminated end of the cable.

Connect a power cable from your computer’s internal power

supply to each internal SCSI device.

STEP 2

STEP 3

Internal Ultra320/160 and Ultra2 SCSI devices come

from the factory with termination disabled and cannot be

changed. Proper termination is provided by the terminator at

the end of the LVD SCSI cable.

Ultra320/160 or Ultra2

SCSI devices

Built-in terminator on cable

Plug first device

to this connector

NOTE

STEP 4

ASC-39320 IG.fm Page 7 Monday, August 12, 2002 9:36 AM

Connecting External SCSI Devices

You can connect external Ultra320/160 and Ultra2 SCSI devices

to the 68-pin external LVD/SE SCSI connector. Each external

device will require a 68-pin external LVD SCSI cable.

Follow these steps to connect your external SCSI devices:

Connect one end of an external SCSI cable to the external

Ultra320/160 connector on the Adaptec SCSI Card 39320.

Connect the other end of the cable to a SCSI connector on the

back of an external device. If you are installing only one external

device, terminate the device and skip to Step 4.

We recommend that you do not combine older SCSI

devices with the newer Ultra320/160 and Ultra2 SCSI devices

on the same SCSI channel of the Adaptec SCSI Card 39320.

NOTE

STEP 1

68-pin external

LVD/SE SCSI

connector (Ch B)

External LVDSCSI

cable

STEP 2

SCSI terminator

ASC-39320 IG.fm Page 8 Monday, August 12, 2002 9:36 AM

Connect the other external SCSI devices by linking each device to

the previous one, as shown below. Terminate only the device at

the end of the chain.

Connect power cables to all external device(s) and to the

computer.

The last SCSI device on the end of each SCSI bus cable must be

terminated, and termination must be disabled for all other devices

in the middle of the cables. Ultra320/160 and Ultra2 SCSI devices

are automatically unterminated, but Ultra SCSI and Fast/Wide

SCSI devices do have termination that you must check. For more

information, refer to the documentation for each SCSI device.

If you are using external Ultra2 or Ultra320/160 devices, be sure

to use anLVD terminator to terminate the last device in the chain.

If you use a single-ended, active terminator (sometimes called an

Ultra terminator) the SCSI devices will not operate properly.

STEP 3

Terminated SCSI device

STEP 4

MORE INFORMATION ABOUT TERMINATION

ASC-39320 IG.fm Page 9 Monday, August 12, 2002 9:36 AM

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