HP Tc2120 HP 2100S SCSI RAID - User Guide (337208-001) - Page 23

Installing Your Controller

Configuring SCSI Termination

The devices on each physical end of a SCSI cable must be terminated. Depending

upon how you configure your system, you will either terminate two SCSI devices, or

the SCSI controller and one peripheral SCSI device.

IMPORTANT:

If you are using multiple SCSI busses on a single controller, each separate bus

must be terminated.

SCSI termination for Adaptec SCSI RAID controllers is configured through the

SMOR utility or from the Configure Host Bus Adapter window in Storage Manager.

The controller has four possible termination settings.

Table 3-1:

Termination Settings

Setting

Function

Auto

The default setting. This setting can be used for all cabling

conditions, except where two Narrow (8-bit) cables are

attached or both a Narrow and Wide cable are used. For this

case, use High Only.

Disabled

Turns off controller termination unconditionally.

Enabled

Turns on controller termination unconditionally.

High Only

Terminates only the additional signals that are used on Wide

SCSI devices. This allows a Narrow cable or a Wide and

Narrow cable to be simultaneously attached to the controller.

High Only termination is available only for devices on Bus 0. Devices on the second

bus (Bus 1) must have 16-bit termination.

By using a 68-pin to 50-pin SCSI cable adapter, an 8-bit SCSI device can be attached

to a Wide SCSI cable along with Wide SCSI devices. However, the device at the end

of the cable must be a Wide SCSI device so that all SCSI signals are terminated. For

internal and external cables where one cable is an 8-bit (Narrow) SCSI cable, set the

controller termination to High Only.

HP 2100S SCSI RAID Controller User Guide

3-3

Section	Page
HP 2100S SCSI RAID Controller User Guide	1
Notice	2
Contents	3
About This Guide	7
Audience Assumptions	7
Important Safety Information	7
Symbols on Equipment	7
Symbols in Text	8
Getting Help	9
Technical Support	9
HP Website	9
Authorized Reseller	10
Reader’s Comments	10
Chapter 1: Introduction	11
Read This First	11
About the Documentation	11
System Requirements	12
Working with Electricity	12
Preventing Electrostatic Discharge	12
Chapter 2: About Your New Controller	13
Introduction	13
Adaptec SCSI RAID Feature Overview	13
DC Power Requirements	14
Environmental Specifications	15
Cache Memory	15
2100S Features	15
Board Layout	17
Cache Memory Module	18
Adapted SCSI RAID Controller LEDs	18
LED Display During Power-Up	18
LED Display During Controller Idle	19
LED Display During Controller Active	19
Cache Status LEDs	20
Chapter 3: Installing Your Controller	21
Installation Overview	21
Configuration	22
Narrow and Wide SCSI	22
Configuring Cables	22
Configuring SCSI Termination	23
Configuring Device IDs	25
Installation	25
Installing Cache Memory Modules	25
Installing the Controller	26
Determining the Booting Controller	27
Controller IRQ and Address	27
NVRAM Reset	28
Chapter 4: Installing Adaptec SCSI RAID Software	29
Microsoft Windows 2000	29
Power Management with Windows 2000	29
Installing on a New System	30
Adding to an Existing System	31
Appendix A: Regulatory Compliance Notices	32
Regulatory Compliance Statements	32
Federal Communications Commission Radio Frequency Interference Statement	32
European Union Compliance Statement	33
Australian/New Zealand Compliance Statement	34
Canadian Compliance Statement	34
Japanese Compliance (Voluntary Control Council Initiative)	34
End-User Software License Agreement	34
Appendix B: Electrostatic Discharge	37
Grounding Methods	38
Appendix C: Troubleshooting	39
	39
Problem 1	39
Solution 1	39
Problem 2	40
Solution 2	40
Problem 3	40
Solution 3	40
Problem 4	41
Solution 4	41
Problem 5	41
Solution 5	41
Problem 6	42
Solution 6	42
Problem 7	43
Solution 7	43
Problem 8	43
Solution 8	43
Problem 9	44
Solution 9	44
Problem 10	44
Solution 10	44
Problem 11	45
Solution 11	45
Problem 12	45
Solution 12	45
Problem 13	46
Solution 13	46
Problem 14	46
Solution 14	46
Problem 15	47
Solution 15	47
Problem 16	47
Solution 16	47
Problem 17	48
Solution 17	48
Problem 18	48

HP Tc2120 HP 2100S SCSI RAID - User Guide (337208-001) - Page 23

Configuring SCSI Termination

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