HP Tape Library Interface Manager Software User Manual

hp surestore

interface manager

user’s guide

Part Number: C9578-90000

Edition 1

December 2001

Typographical conventions and

In this manual

terms

Bold: Menu choices and screens on the

library.

[Bold]: Soft keys to press on the library.

Computer:

Emphasis: Draws attention to items within

This table format indicates the menus you need to enter on the library front panel:

Edit -> Create -> SCSI-II Library

Note Notes explain significant concepts or

Caution Cautions call attention to an operating

Host and SCSI commands.

text.

operating instructions.

procedure or practice that could damage the product if not correctly performed. Do not proceed until you understand and meet these required conditions.

Chapter 1 Introduction: Describes the

operation of the HP Surestore Interface Manager, as well as manager components and supported products.

Chapter 2 Overview: Provides an overview

of the configuration options.

Chapter 3 Management Operations:

Describes the management operations, system utilities and statistics, diagnostics and trace history.

Chapter 4 SAN Environments: Provides an

overview of Storage Area Network environments.

Chapter 5 Troubleshooting: Describes the

troubleshooting process, as well as problem-solution scenarios.

Appendix A DB-9 Serial and RJ-45 Ethernet

Pin Assignment

Appendix B Fibre Channel Interface and

Commands Appendix C SCSI Interface and Commands Appendix D Customer Support

WARNING Warnings call attention to a procedure

or practice that could result in personal injury if not correctly performed. Do not proceed until you fully understand and meet the required conditions.

2 Typographical conventions and terms hp surestore interface manager

Notice

This document contains information that is protected by copyright. All rights are reserved. No part of this document may be photocopied, reproduced, or translated into another language. The information contained in this document is subject to change without notice.

Warranty

Note See Appendix D for more

information about service and support.

HP Product: HP Surestore Interface Manager Duration of limited warranty: One Year

1. HP warrants HP hardware, accessories, and

supplies against defects in materials and workmanship for the period specified above. If Hewlett-Packard receives notice of such defects during the warranty period, Hewlett-Packard will, at its option, either repair or replace products which prove to be defective. Replacement products may be either new or like-new.

2. HP warrants that HP software will not fail to

execute its programming instructions, for the period specified above, due to defects in material and workmanship when properly installed and used. If HP receives notice of such defects during the warranty period, HP will replace software media that does not execute its programming instructions due to such defects.

3. HP does not warrant that the operation of HP

products will be uninterrupted or error free. If HP is unable, within a reasonable time, to repair or replace any product to a condition as warranted, customer will be entitled to a refund of the purchase price upon prompt return of the product.

4. HP products may contain remanufactured parts

equivalent to new in performance or may have been subject to incidental use.

5. The warranty period begins on the date of

delivery or on the date of installation if installed by HP. If customer schedules or delays HP installation more than 30 days after delivery, warranty begins on the 31st day from delivery.

6. Warranty does not apply to defects resulting from

(a) improper or inadequate maintenance or calibration, (b) software, interfacing, parts or supplies not supplied by HP, (c) unauthorized modification or misuse, (d) operation outside of the published environmental specifications for the products, or (e) improper site preparation or maintenance.

7. TO THE EXTENT ALLOWED BY LOCAL LAW, THE

ABOVE WARRANTIES ARE EXCLUSIVE AND NO OTHER WARRANTY OR CONDITION, WHETHER WRITTEN OR ORAL, IS EXPRESSED OR IMPLIED AND HP SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OR CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, AND FITNESS FOR A PARTICULAR PURPOSE.

8. HP will be liable for damage to tangible property

per incident up to the greater of $300,000 or the actual amount paid for the product that is the subject of the claim, and for damages for bodily injury or death, to the extent that all such damages are determined by a court of competent jurisdiction to have been directly caused by a defective HP product.

9. TO THE EXTENT ALLOWED BY LOCAL LAW, THE

REMEDIES IN THIS WARRANTY STATEMENT ARE THE CUSTOMER’S SOLE AND EXCLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE, IN NO EVENT WILL HP OR ITS SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST PROFIT OR DATA), OR OTHER DAMAGE, WHETHER BASED IN CONTRACT, TORT, OR OTHERWISE.

hp surestore interface manager Notice 3

Reference Standards

■ Fibre Channel Physical and Signaling Interface

(FC-PH), ANSI X3T9.3/Project 755D/Rev. 4.3, Contact: Global Engineering, 1-800-854-7179.

■ Fibre Channel Protocol for SCSI (FCP) Rev. 12

■ Fibre Channel Private Loop Direct Attach (FC-

PLDA).

■ Fibre Channel Arbitrated Loop (FC-AL), ANSI

X3T11/Project 960D/ Rev. 4.54, Contact: Global Engineering, 1-800-854-7179.

■ Gigabit Interface Converter (GBIC), Small for

Factor, SFF-8053, Rev. 5.X.

■ Common FC-PH Feature Sets Profiles, Fibre

Channel Systems Initiative, FCSI-101-Rev. 3.1.

■ SCSI Profile, Fibre Channel System Initiatives,

FCSI-201-Rev. 2.2.

■ FCSI IP Profile, Fibre Channel System Initiative,

FCSI-202-Rev. 2.1.

■ ANSI Document T10/99-143 r1 www.t10.org.

4 Reference Standards hp surestore interface manager

Typographical conventions and terms 2 In this manual 2 Notice 3 Warranty 3 Reference Standards 4

Chapter 1 Introduction 11

Chapter Overview 11 How the Interface Manager (IM) Works 12 Processing SCSI Information 14 Interface Manager (IM) Features 15

Fibre Channel Features 15 SCSI Bus Features 15 Configuration Features 15 Management Features 16

Interface Manager (IM) Components 17

Supplied Components for the Interface Manager 17

Specifications 19

Physical Specifications of the Interface Manager (IM) 19 Environmental Specifications 19

Supported Products 20

Optical Fibre Channel Cables 22

contents

Chapter 2 Interface Manager Overview 23

Chapter Overview 23 Overview of the Interface Manager (IM) Configuration 24 Choosing the Right Configuration 25

Fibre Channel Port Mode 28 Fibre Channel Arbitrated Loop Addressing 29

Hard Addressing 29

Soft Addressing 29 Host Device Configuration 30 SCSI Addressing 30 Buffered Tape Writes 30 Address Mapping 31

Auto-Indexed Mapping 32

Fixed-Indexed Mapping 32 Configuration Methods 33

Serial 33

Ethernet 33

Telnet 33 Web Based Administrator 34

Chapter 3 Management Operations 35

Chapter Overview 35 Management Interfaces 36

Serial 36 Ethernet 36 Telnet 36 Web Based Administrator 37 FTP 37

Configuration Using the Telnet Interface 38

Overview 38 Accessing Telnet 38 Changing the Administration Password Using Telnet 40 Changing the Clock Setting Using Telnet 40 Changing the Ethernet Configuration Using Telnet 42 Changing the Fibre Channel Address Modes Using Telnet 42

Hard Addressing 43

Soft Addressing 44

Using Your Own Settings 44 Placing a Fibre Channel Interface Card Off-Line Using Telnet 45 Placing a Fibre Channel Interface Card On-Line Using Telnet 47

Installing a New Fibre Channel Interface Card Using Telnet 49 Changing a Fibre Channel Interface Card Configuration Using Telnet 51 Choosing Which Card to be Configured 51 Factory Defaults for the Fibre Channel Interface Card 52 Configuration Using the Web Based Administrator 53 Overview 53 Accessing the Web Based Administrator 55 Making Changes via the Web Interface 56 Changing the Clock Setting Using the Web Administrator 56

Setting Date and Time 56

Time Shown is NOT Correct 57

Setting a Time That is Different From the Time Shown 58 Changing the Ethernet Configuration Using the Web Administrator 58

Using DHCP 59

Not Using DHCP 60 Changing the FC Address Modes Using the Web Administrator 60

Hard Address Settings 62

Soft Address Settings 62

Selecting Your Own Settings 63 Placing a FC Interface Card Off-Line Using the Web Administrator 64 Placing a FC Interface Card On-Line Using the Web Administrator 67 Installing a New Interface Card Using the Web Administrator 70

Download a New Revision of the Firmware 72

Using the Web Interface 72

FTP Interface (All Cards)- Customer Engineer (CE) Only 74

Upgrade Firmware Using FTP 74 FTP Interface (Single Card) 75

Upgrade Firmware Using FTP 75

Chapter 4 SAN Environments 77

Chapter Overview 77 Installation and Configuration 78 Omniback Configuration 81 HP-UX Configuration 85

Stopping the dm_stape process 88 Preventing dm_stape from polling 91

Windows Configuration 92

Windows 2000 Removable Storage Manager 92

Solaris Configuration 94 Switch Configuration 95

HP/Brocade Switch and Interface Manager Configuration 95 FC-64 Director (McData) Switch 96 Troubleshooting 97

Chapter Overview 97 Troubleshooting 98 Operation Indicators 99

Basic Verification 103

LED Indicators 103

Verify SCSI Bus Configuration 103

Verify Fibre Channel Connection 104

Verify SCSI Devices in Windows NT 104

Verify Device Recognition in HP-UX 105

Verify Configuration 106

Verify Devices 106

Verify Host Configuration 106

Verify HBA Device Driver Information 106

Serial Port Problems 106

Customer Support 106

Problem - Solution 107

Problem: Drives Not Detected after Power Failure 107

Option 1 - Not Using Telnet or the Web Interface 107

Option 2 - Using Telnet 107

Option 3 - Using the Web Interface 107 Problem: Cannot Turn on the Interface Manager 108 Problem: Cannot Confirm the Library Connection (Windows NT) 108 Problem: Cannot Confirm Connection Through a Fibre Channel Switch 110 Problem: Cannot Confirm the Library Connection (HP-UX) 110

Appendix A DB-9 Serial and RJ-45 Ethernet Pin Assignment 115

Serial and Ethernet Assignment 115

Appendix B Fibre Channel Interface and Commands 117

Download Commands 117

Upgrade Firmware 117 Report LUNs Command 119 PRLI Data 121

Appendix C SCSI Interface and Commands 123

SCSI Inquiry Data 123

Appendix D Customer Support 125

Registering Your Product 125

Backup Software Support 125

Hewlett-Packard Customer Support 126

Information Needed for Support 126

Introduction

Chapter Overview

This chapter contains information on the following:

■ How the Interface Manager (IM) Works on page 12

■ Processing SCSI Information on page 14

■ Interface Manager (IM) Features on page 15

■ Interface Manager (IM) Components on page 17

■ Specifications on page 19

■ Supported Products on page 20

Introduction 11

How the Interface Manager (IM) Works

The IM provides connectivity between a Fibre Channel (FC) switched fabric (FC-SW) or Fibre Channel arbitrated loop (FC-AL) and up to 20 Ultra-2 SCSI buses.

The IM contains slots for up to eleven (one slot is reserved for future expansion) Fibre Channel cards. Each card connects a FC port to two Ultra-2 SCSI ports. The IM also contains a Remote Management Card (RMC) in slot 1, and a controller card in slot 2. The RMC provides the user with a serial port for initial setup, as well as Telnet and Web Administrator - HTTP access to any of the cards in the IM.

Each FC card translates the FC protocol (FCP) to and from the SCSI protocol so that FC and SCSI devices can communicate. The FC card attaches to a FC host, hub, or switch and transfers the command, data, and status information to SCSI targets. Packets are transferred transparently by the IM between a host and targets and vice versa.

SCSI and Fibre Channel connectors are accessed from the front of the IM. Ethernet and serial ports provide the means for configuring and managing the IM. A power connector is located on the front of the Interface Manager.

12 Introduction Chapter 1

Figure 1 shows the front view of the Interface Manager.

Figure 1 Front View of the Interface Manager

Chapter 1

Table 1 Features of the Interface Manager

Number Part

1 Serial DB-9 connector for terminal access

2 Ethernet RJ-45 connector for FTP, Telnet and Web browser access

3 Remote management card

4 Controller card

5 Slots for Fibre Channel interface cards

6 Reserved slot

7Redundant power supply

Chapter 1 Introduction 13

Processing SCSI Information

The following section describes how the Interface Manager (IM) processes SCSI information when attached to Fibre Channel (FC) hosts.

1. A FC host issues a command. The FC host encapsulates the SCSI command in the FC protocol and sends the packet to the IM.

2. The FC card in the IM receives the packet, interprets the FC information, and places the packet in buffer memory.

3. The IM’s processor interprets the information and programs a SCSI controller to process the transaction.

4. The SCSI controller sends the command to the SCSI device (target).

5. The SCSI target interprets the command and executes it.

6. Data flows between the FC host and SCSI target through payload buffers.

7. Response information flows from the SCSI target back to the FC host.

14 Introduction Chapter 1

Interface Manager (IM) Features

Fibre Channel Features

■ Fibre Channel target mode

■ Single 1.0625 Gbps FC port

■ Fibre Channel arbitrated loop (FC-AL) and switched fabric (FC-SW)

topologies, includes point-to-point (PPP) configurations

■ Private Loop Direct Attach (PLDA) profile compliant

■ Class 3 connection with SCSI-FCP protocol

■ Supports FCP-2 error recovery protocol as specified in FCP-2 rev. 03 for

use with streaming devices (such as tape) and medium changers

SCSI Bus Features

■ SCSI initiator mode

■ Up to 20 auto-negotiating SCSI buses (Narrow, Wide, Fast, Ultra)

■ Ultra-2 wide SCSI for data transfer up to 80MB/s per bus (LVD)

■ Ultra-2 wide SCSI for data transfer up to 40MB/s per bus (HVD)

Chapter 1

■ SCSI-2 and SCSI-3 protocols

■ Differential or LVD/single-ended internal termination

(HVD or LVD Single-ended)

■ Supports tape and medium changer SCSI devices

Configuration Features

■ DHCP for easier network administration

■ Serial DB-9 connector for terminal access

■ Ethernet RJ-45 connector for FTP, Telnet and Web browser access

■ Field-upgradeable firmware

Chapter 1 Introduction 15

Management Features

■ Out-of-band Ethernet TCP/IP management access

■ In-Band management

16 Introduction Chapter 1

Interface Manager (IM) Components

This section includes a list of all parts supplied with the IM, and environmental considerations.

Supplied Components for the Interface Manager

Figure 2 Supplied Components

Chapter 1

Chapter 1 Introduction 17

Table 2 Supplied Components

No. Item Qty Description

1 HP Surestore Interface Manager 1 Base Product: Chassis, Interface Manager controller,

remote management card, power supply and three fans

2 Mounting rails 2 Left and right mounting rails

3 Mounting rail extensions 2 Used for the 10/180 tape library only

4 Hardware identification board 1 Hardware consisting of:

6 - 10x32 hex nuts 12 - sheet metal nuts 16 - 10x32 x 50 machine screws

5 Flush mount brackets 2 Left and right flush mount brackets

6 Cable labeling kit 1 Label kit to label the SCSI and fibre cables

7 Power distribution unit 1 Power distribution unit

8 HP Surestore Interface Manager

Installation and Cabling Poster

9 HP Surestore Interface Manager

User’s Guide

10 Serial cable 1 Serial cable

11 Power cord 1 power cord (PDU to the Interface Manager)

12 SCSI cable 1 2.5 meter FC SCSI cable for daisy chaining the robotics to

13 Localized power cord 1 Localized power cord (wall to PDU)

18 Introduction Chapter 1

1 Installation and Cabling Poster

1User’s Guide

a drive - High Density - Do not use with the Interface Manager

Specifications

Physical Specifications of the Interface Manager (IM)

The IM is installed inside the accessory bin of the 10/180 and 20/700 HP tape libraries.

The physical characteristics are as follows:

Table 3 Physical Specifications of the Interface Manager

Height 8.48 inches (21.2 cm)

Width 17.26 inches (43.15 cm)

Depth 10.78 inches (26.95 cm)

Chapter 1

Weight (to include box with fans, redundant power supply, Interface Manager controller and RMC boards and 11 slot covers)

Environmental Specifications

Choose a location that meets the following criteria:

Table 4 Location Criteria

Room temperature 50

Humidity 20% to 80% relative humidity, non-condensing

Power source AC power voltage: 100-127 VAC/200-240VAC

Approximately 34.2 pounds (15.54 kg)

- 95o Farenheit (10o - 35o C)

50-60 Hz

Chapter 1 Introduction 19

Supported Products

Table 5 shows the products that Hewlett-Packard supports for connection with

the Interface Manager:

Table 5 Supported Products

Description Product

HP SureStore E Tape Libraries: 10/180 and 20/700 with Ultrium, DLT 7000, DLT 8000, and 9840 tape drives

HP Fibre Channel Switches Brocade SilkWorm 2800 - A5624A

QLogic Fibre Channel HBA Win NT 4.0, Windows 2000, Netware 5.x - QLA-2200F

Emulex HBA Win NT 4.0, Windows 2000 - LP8000-N1, LP8000-F1

Compaq HBA Win NT 4.0, Windows 2000 - 176479-B21

10/180 - A5617A 20/700 - A5597A, A5597B

Brocade SilkWorm 2400 - A5625A

20 Introduction Chapter 1

Table 5 Supported Products

Description Product

HP Fibre Channel Host Bus Adapters HP-UX 11.11,11.0 A5158A (pci)

HP-UX 11.11,11.0, 10.20 A6685A (hsc-K class), A6684A (hsc-D, R class)

A6684A and A6685A adapters are only supported on the following R, D, and K-class servers:

A6684A Supported Platforms:

R-class R380.R390

D-class D220.D230/D320/D330

D270/D280/D370/D380/D390

A6685A Supported Platforms:

K-class K220/K420/K250/K450/K260/K360/

K370/K380/K460/K570/K580

HP-UX 11.0; V, N & L Class - A5158A HP-UX 10.20 & 11.0; T600 - A3636A HP-UX 10.20 & 11.0; D & R Class - A3591B HP-UX 10.20 & 11.0; K Class - A3404A Win NT 4.0, Windows 2000 - D8602A Win NT 4.0 SP 4 & above; HP Netserver - D8602A/B Win NT 4.0 SP 4 & above; Compaq Proliant - D8602A/B Win NT 4.0 SP 4 & above; Dell PowerEdge - D8602A/B Win NT 4.0 SP 4 & above; IBM Netfinity - D8602A/B

Chapter 1

Sun Solaris 2.6, 7, 8 JNI FC64-1063N (sbus)

JNI FCI-1063 (pci) JNI FCE-1063-N (sbus) FCE-6410-N (pci)

Note DLT 7000 tape drives are only supported in the 20/700 tape

library.

Chapter 1 Introduction 21

Note The A3636A, A3591B and the A3404A FC HBA are only

supported in point-to-point (PPP) configurations (not through a switch).

Note HVD SCSI tape drives (DLT 7000, DLT 8000, 9840, and the

HVD version of Ultrium) should only be attached to HVD SCSI ports on the Interface Manager.

Optical Fibre Channel Cables

The Interface Manager uses the following fiber-optic cables available in the lengths listed in Table 6.

Table 6 Fibre-Optic Cable Lengths

Product Number Length

A3583A FC Optical Cable 2 meters

A3531A FC Optical Cable 16 meters

A3735A FC Optical Cable 50 meters

A3736A FC Optical Cable 100 meters

A5225A SW Optical/GBIC N/A

22 Introduction Chapter 1

Interface Manager Overview

Chapter Overview

This chapter contains information on the following:

■ Overview of the Interface Manager (IM) Configuration on page 24

■ Choosing the Right Configuration on page 25

Chapter Overview 23

Overview of the Interface Manager (IM) Configuration

The IM can be configured through one of several user interfaces:

■ Over a serial port via a terminal or terminal emulation utility

■ Over Ethernet via a Telnet utility, Internet Web browser, or SNMP

management tool

Note Before configuring the Interface Manager, a basic understanding

of Fibre Channel and SCSI devices is recommended.

For information on SCSI standards, refer to publications from the X3T10 committee of ANSI (American National Standards Institute). For information on Fibre Channel standards, refer to publications from the X3T11 committee of ANSI. Approved American National Standards and Technical Reports may be purchased from:

ANSI 11 West 42nd Street 13th Floor New York, NY 10036 Sales Department: (212) 642-4900

24 Overview of the Interface Manager (IM) Configuration Chapter 2

Choosing the Right Configuration

The factory default settings of the Interface Manager (IM) permit the type of configuration shown in Figure 3 on page 26 (standard configuration) to work without any initial changes to these settings. The IM settings may need to be changed for expanded configurations (see Figure 4 on page 27) or certain application requirements.

Chapter 2

Chapter 2 Choosing the Right Configuration 25

Figure 3 Example of a Standard Configuration in a 20/700 Tape Library

26 Choosing the Right Configuration Chapter 2

Figure 4 Expanded Configuration

Chapter 2

Chapter 2 Choosing the Right Configuration 27

A standard configuration may involve several Fibre Channel (FC) hosts connected to multiple FC cards. These FC host systems may be connected to the cards either in a point-to-point (PPP) fashion or through a FC switch. Each card is then connected to two SCSI tape drives.

The library’s robotics controller may be daisy-chained with one of the SCSI tape drives or connected directly to an available FC interface card SCSI port, or direct connect SCSI to host.

Note When daisy-chaining the library’s robotics controller to any LVD

Fibre Channel Port Mode

The IM’s Fibre Channel ports can operate in either NL_Port or N_Port mode. The IM has the ability to autosense and choose between these modes of operation.

■ NL_Port - The IM can share a FC Arbitrated Loop with other NL_Port

devices (or HBAs). A single FC switch port acting in FL_Port mode can also be connected to the loop.

■ N_Port - The IM does not employ the arbitrated loop protocol. This allows

for a more efficient connection to a single FC switch port acting in F_Port mode.

Some FC switches (such as the HP/Brocade SilkWorm) support either FL_Port and F_Port modes with autosensing capabilities. Other switches (such as the HP Surestore Director) only support the F_Port mode. When connecting directly to a FC switch port, configure the IM in N_Port mode for a more stable and efficient connection.

Port mode can only be set in the FC Configuration menu via the Telnet interface. See Configuration Using the Telnet Interface on page 38.

tape drive, the library must have the LVD to HVD converter (A6324A) installed.

28 Choosing the Right Configuration Chapter 2

Fibre Channel Arbitrated Loop Addressing

On a FC arbitrated loop, each device appears as an Arbitrated Loop Physical Address (AL_PA). To obtain an AL_PA, two methods called soft and hard addressing can be used by the IM. The IM can be configured to use either method.

Hard Addressing

Hard addressing is recommended for FC arbitrated loop environments where it is important that the FC device addresses do not change. Device address changes can affect the mapping represented by the host operating system to the application. An example of such an environment would be a tape library installation, where the application configuration requires fixed device identification for proper operation. Hard addressing ensures that the device identification to the application remains constant.

When acquiring a hard address, the IM attempts to acquire the AL_PA value that was specified by user configuration. If the desired address is not available at loop initialization time, the IM will come up on the FC loop using an available soft address. This allows the loop to continue to operate. This situation would occur when another device on the arbitrated loop has acquired the same address as that configured on the IM.

When connected to a FC switch, the IM is identified to the switch as a unique device by the factory programmed World Wide Name (WWN).

Soft Addressing

Soft addressing is recommended for FC fabric environments where the FC interface card does not employ the Arbitrated Loop protocol. In these environments, an AL_PA is not used as part of the device address, so soft addressing allows the FC interface card to operate as an N_Port. Soft addressing is recommended primarily for switched fabric configurations.

When acquiring a soft address, the FC interface card acquires the first available loop address starting from address 01 and moving up the list of available AL_PAs to EF. In this mode, the FC interface card automatically obtains an available address and participates on the FC loop, as long as there is at least one address available on the loop that is connected to the IM. FC supports up to 126 devices on an arbitrated loop.

Chapter 2

Chapter 2 Choosing the Right Configuration 29

Host Device Configuration

The host system using a FC host bus adapter (HBA) will typically map FC devices into the existing device mapping scheme used by that operating system. (Refer to your HBA manual for the mapping table.) The FC usually maps FC addresses to SCSI target addresses. In such a configuration, the IM corresponds to a bus:target identifier, with the SCSI devices attached to the IM appearing as logical units (LUNs). In addition, operating systems can extend the available SCSI limit of 15 Target IDs per bus.

Although this is not an issue for the operating system or most applications, there are cases where older applications or Windows NT can have expectations about what are valid SCSI IDs, and not deal correctly with certain mappings. In particular, applications have been seen to exhibit difficulties addressing Target IDs greater than 15 (e.g. 16 and up). This problem can be resolved by configuring the IM to use hard addressing, and setting the AL_PA used by the IM to a value that the HBA will map to, with an ID having a value less than 16.

SCSI Addressing

A FC interface card appears on each SCSI bus as a single initiator. The default initiator ID is 7. No other device on the SCSI bus may use this address. Note that the FC host itself is not connected to the bus. Their SCSI operations are passed down to the individual SCSI target devices through the use of the IM’s SCSI Initiator ID.

The IM negotiates for the maximum values for transfer rates and bandwidth on a SCSI bus. If an attached SCSI device does not allow the full rates, the IM will use the best rates it can negotiate for that device. Negotiation is on a device specific basis, so the IM can support a mix of SCSI device types on the same SCSI bus.

Buffered Tape Writes

Buffered Tape Writes is an option designed to enhance system performance. By returning status on consecutive write commands prior to the tape device receiving data, Buffered Tape Writes remove the latency of waiting for responses from the tape device. In the event that data does not transfer correctly for any reason, the interface card will return a check condition on a subsequent command.

30 Choosing the Right Configuration Chapter 2

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