Adaptec 39320A-R Manuale utente

ADAPTEC SCSI CARD 39320A

INSTALLATION GUIDE

ASC-39320A IG.fm Page 0 Tuesday, July 29, 2003 3:17 PM

Introduction

The Adaptec SCSI Card 39320A 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 39320A has two independent SCSI

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

channel. SCSI Channel A (marked CH A on the card) has one

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

connector and one external 68-pin very high-density cable

interconnect (VHDCI) connector. SCSI Channel B (marked CH B on

the card) has one internal 68-pin LVD/SE connector and one

external 68-pin VHDCI 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 39320A 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.

68-pin external

LVD/SEVHDCIconnector

Channel A

68-pin internal LVD/SE

connector ChannelA 68-pin internal LVD/SE

connector Channel B

68-pinexternal

LVD/SE VHDCI connector

Channel B

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This installation guide explains how to:

■Install the Adaptec SCSI Card 39320A

■Set up SCSI devices

■Connect SCSI devices

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 39320A and that you connect

newer Ultra320/160 SCSI and Ultra2 devices to the other channel.

This allows the Adaptec SCSI Card 39320A 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.

Note: 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.

Installing the Adaptec SCSI Card 39320A

1Discharge 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).

Warning: Turn OFF power to the computer and disconnect

the power cord.

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2After you turn off your computer and unplug the power cord,

remove the cover from the computer.

3Locate 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 39320A 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/PCI-X slots. If

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

easier installation of the Adaptec SCSI Card 39320A.

Slot cover screw

Expansion slot

cover

64-bit PCI slot

32-bit PCI slot

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Warning: Be careful when inserting the Adaptec SCSI Card

39320A in a PCI slot. Some 32-bit slots will not

accommodate it, and the card may break if you force it into

the slot.

4Insert the Adaptec SCSI Card 39320A 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.

Setting Up SCSI Devices

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

before you connect them to the Adaptec SCSI Card 39320A:

■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.

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Following are some guidelines for setting SCSI IDs and termination

on your devices.

Check the SCSI IDs

The Adaptec SCSI Card 39320A 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.

The Adaptec SCSI Card 39320A 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.

Note: 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.

Connecting SCSI Devices

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

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

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

page 4.

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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 of the 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.

The Adaptec SCSI Card 39320A 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.

Note: Adaptec recommends that you keep your Ultra320/160

and Ultra2 SCSI devices separate from your Ultra SCSI

devices. This allows the Ultra320/160 and Ultra2 SCSI

devices to transfer data at their maximum speed.

Follow these steps to connect your internal Ultra320/160 and

Ultra2 devices:

1Locate a 68-pin internal LVD SCSI cable, which may have either

twisted wires or flat wires, shown as follows.

ASC-39320A IG.fm Page 6 Tuesday, July 29, 2003 3:17 PM

2Plug the nonterminated end of the cable(s) to one of the internal

LVD/SE connectors.

3Plug the internal Ultra320/160 and Ultra2 SCSI devices to the

other cable connectors, starting with the connector at the

terminated end of the cable.

Note: 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.

4Connect a power cable from your computer’s internal power

supply to each internal SCSI device.

Ultra320/160 or Ultra2

SCSI devices

Built-in terminator on cable

Plug first device to

this connector

ASC-39320A IG.fm Page 7 Tuesday, July 29, 2003 3:17 PM

Connecting External SCSI Devices

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

the 68-pin external LVD/SE VHDCI SCSI connectors. Each external

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

Note: 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 39320A.

Follow these steps to connect your external SCSI devices:

1Connect one end of an external SCSI cable to one of the external

Ultra320/160 connectors on the Adaptec SCSI Card 39320A.

2Connect 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.

VHDCI External LVD SCSI

cable

68-pin external LVD/SE VHDCI

SCSI connectors

SCSI terminator

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3Connect 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.

4Connect power cables to all external device(s) and to the

computer.

More Information About Termination

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 an LVD 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.

ASC-39320A IG.fm Page 9 Tuesday, July 29, 2003 3:17 PM

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