Adaptec 2120S - SCSI RAID Controller Manuale utente

INSTALLATION

GUIDE

ADAPTEC SCSI CARD 19160

ULTRA160 SCSI CONTROLLER

ASC-19160_IG.book Page 1 Wednesday, December 1, 1999 12:47 PM

ASC-19160_IG.book Page 2 Wednesday, December 1, 1999 12:47 PM

Adaptec SCSI Card 19160

The Adaptec SCSI Card 19160 Ultra160 SCSI controller enables

you to connect up to 15 SCSI devices—such as hard disk drives,

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

with 32-bit PCI expansion slots.

You can connect newer LVD SCSI devices, such as Ultra160 and

Ultra2 SCSI devices, to the 68-pin internal Low Voltage

Differential/Single-Ended (LVD/SE) connector. You can also

connectSingle-Ended(SE)Fast/Ultra SCSIdevices,to the50-pin

internal and external Fast/Ultra-SE connectors.

This installation guide explains how to

•Install the Adaptec SCSI Card 19160

•Set up SCSI devices

•Connect SCSI devices

INTRODUCTION

50-pin External Fast/Ultra-SE Connector

68-pin Internal LVD/SE Connector50-pin Internal Fast/Ultra-SE Connector

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Installation Guide

Bus Segments on the Adaptec SCSI Card 19160

The Adaptec SCSI Card 19160 features Adaptec SpeedFlex™

technology. SpeedFlex technology ensures that you get the best

performance from your LVD SCSI devices by electronically

isolating the LVD/SE segment from the SE segment on the SCSI

bus. This allows the Adaptec SCSI Card 19160 to support LVD

SCSI devices at speeds up to 160 MBytes/sec on the LVD/SE seg-

ment while at the same time supporting SE Fast/Ultra SCSI

devices at speeds up to 20 MBytes/sec on the SE segment. The

following figure shows the two SCSI segments.

If you attach Wide Ultra or Ultra SCSI devices to the

connector on the LVD/SE segment, the data transfer rate for

all attached LVD SCSI devices will drop to Ultra SCSI perfor-

mance levels. However, if you attach onlyLVD SCSIdevicesto

the connector on the LVD/SE segment, data will be trans-

ferred at the maximum possible rate (80 MBytes/sec for

Ultra2 devices and 160 MBytes/sec for Ultra160 devices).

AIC-3860

AIC-7892

SE Segment LVD/SE Segment

NOTE

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Adaptec SCSI Card 19160

Dischargeanystaticelectricitybuild-upbeforehandlingtheSCSI

cardbytouchingagroundedmetalobject(like theexposedmetal

parts on the back of your computer).

After you turn off your computer and unplug the powercord,

remove the cover from the computer.

Locate an unused 32-bit PCI expansion slot and remove the

expansion slot cover. (The expansion slot must be compliant

with PCI Rev. 2.1 or higher and must support Bus Mastering.)

Save the slot cover screw for use in Step 4.

INSTALLING THE ADAPTEC SCSI CARD 19160

STEP 1

Turn OFF power to the computer and disconnect

the power cord.

WARNING

STEP 2

STEP 3

Slot Cover Screw

Expansion

Slot Cover

PCI Expansion Slots

(Typically White or Ivory)

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Installation Guide

Computersmayhave verticalorhorizontalexpansionslots.Refer

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

puter is a tower model, lay it on its side tomake it easier to install

the Adaptec SCSICard 19160.

Insert the Adaptec SCSI Card 19160 into the PCI expansion slot;

pressdownfirmlyuntilthecardclicksintoplace,thenreplacethe

slot cover screw. When installed properly, the card should appear

level with the expansion slot, as shown below.

STEP 4

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Adaptec SCSI Card 19160

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

before you connect them to the Adaptec SCSI Card 19160:

•Check the SCSI IDs

•Terminate the Ends

•Mount the Devices

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

device’s documentation for specific instructions.

Beloware some guidelines for checking SCSI IDs, setting termi-

nation, and mounting devices in your computer. Refer to the

Adaptec SCSI Card 19160 User’s Reference for more information

on these topics.

Check the SCSI IDs

The Adaptec SCSI Card 19160 and each device you connect to it

must have a unique SCSI ID number ranging from0 to 15.

No two devices can have the same number.

The Adaptec SCSI Card 19160 is preset to SCSI ID 7 and should

not be changed. If your computer will boot from a SCSI hard

disk, make sure the SCSI ID of that hard disk 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 of the SCSI Bus

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 (orenabled). Terminatorsmustbe removed,

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

each cable.

Terminating LVD (Ultra160 and Ultra2) SCSI Devices

LVD SCSI devices are automatically un-terminated. If you have

internal LVD SCSI devices, a special 68-pin internal LVD cable is

required to connect the devices. Internal LVD cables usually have

SETTING UPSCSI DEVICES

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Installation Guide

an LVD or Auto switching terminator built into the end of cable.

With this type of cable, itis not necessary to terminate individual

internal LVD SCSI devices. If your cable does not have a termina-

tor built-in, you must add a terminator to theend of the cable.

Terminating Fast/Ultra SCSI Devices

OnmostinternalFast/UltraSCSIdevices,theterminationsetting

is controlled by setting a jumper or a switch, or by physically

removing or installing a resistor module(s). If you are using an

internal SCSI cable that has a built-in terminator, you must dis-

able termination on all internal devices connected to the cable.

On most external Fast/UltraSCSI devices, termination is con-

trolled by installing or removing a terminating plug. For more

information, refer to the documentation for each SCSI device.

Mount the Devices

If you have internal SCSI devices, mount each device in an avail-

able drive bay inside your computer, as shown below. Refer to

yourcomputer and device documentation for instructions on

installing devices inside your computer.

External LVD devices arenot supported by the Adaptec

SCSI Card 19160.

NOTE

Internal SCSI Device

Mounted in Drive Bay

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Adaptec SCSI Card 19160

You can connect up to 15SCSI devices tothe Adaptec SCSI Card

19160. Before connecting devices, be sure to review Setting Up

SCSI Devices on page 5. For additional details on connecting

devices, refer to the Adaptec SCSI Card 19160 User’s Reference.

Connecting Internal LVD (Ultra160 and Ultra2) SCSI

Devices

Connect internal LVDSCSI devices to the internal LVD/SE

connector on the Adaptec SCSI Card 19160. To do this, use a

68-pin internal LVD cable like the one shown in Step 1 below.

Follow these steps to connect the devices:

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

twisted wires as shown below to support LVD devices.

CONNECTING SCSI DEVICES

We recommend that you keep your LVD SCSI devices

separate from your SE (Ultra SCSI) devices. This allows LVD

SCSI devices to transfer data at their maximum speed. (See

BusSegments on the Adaptec SCSI Card 19160 on page 2.)

NOTE

STEP 1

Terminated End Nonterminated End

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Installation Guide

Plug the nonterminated end of the cable to the internal LVD/SE

connector.

PlugtheinternalLVDSCSIdevicestotheothercableconnectors,

starting with the connector at the terminated end of the cable.

STEP 2

68-pin Internal LVD

SCSI Cable

68-pin Internal LVD/SE Connector

STEP 3

Internal LVD SCSI devices come from the factory with

termination disabled and cannot be changed. Proper SCSI

bus termination is provided by the terminator at the end of

the LVD SCSI cable. See Terminate the Ends of the SCSI Bus

on page 5 for more information.

LVD (e.g., Ultra160 or

Ultra2) SCSI Devices

Built-in Terminator

on Cable

Plug First Device

to this Connector

NOTE

ASC-19160_IG.book Page 8 Wednesday, December 1, 1999 12:47 PM

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