IBM 150, 260 4.3.1 General SCSI Cabling Considerations

106 RS/6000 43P 7043 Models 150 and 260 Handbook

The following describes the SCSI cabling of the two PCI SCSI adapters

supported by the Model 150 and 260 entry workstation and workgroup

servers:

• PCI Single-Ended Ultra SCSI Adapter (# 6206)

• PCI Differential Ultra SCSI Adapter (# 6207)

4.3.1 General SCSI Cabling Considerations

Before describing SCSI cabling features, it is necessary to understand the

following primary specifications of SCSI technology:

• Default SCSI cable routing

• Maximum SCSI bus length

• SCSI terminators

• SCSI device addresses

• SCSI bus width

4.3.1.1 Default SCSI Cable Routing

SCSI IDs for the storage devices are defined by the location in which they are

installed. The standard SCSI cable is used for all combinations. SCSI

termination is done on the system planar. Termination setting of all internal

SCSI devices must be set to OFF.

4.3.1.2 SCSI Bus Length

SCSI bus length is defined as the distance between terminators at either end

of a SCSI bus. The SCSI specifications allow the following maximum bus

length for each SCSI bus:

• SCSI-II Single Ended: 6 meters (20 feet)

• SCSI-II Fast/Wide Single Ended: 3 meters (10 feet)

• SCSI-II Fast/Wide Differential: 25 meters (80 feet)

For configurations using both internal and external cabling, length restrictions

apply to the length from the end of the internal cable to the terminator on the

last device on the external bus.

Refer to the publication

IBM RS/6000 Adapters, Devices and Cables

information for Multiple Bus Systems

, SA38-0516, for specific SCSI cabling

information.

Note

Contents

Main Page Page Page Contents Page Page Page Page Page Figures Page Tabl es Page Preface The Team That Wrote This Redbook Page Comments Welcome Page Chapter 1. RS/6000 Introduction 1.1 RS/6000 Workstation Offerings Page 1.2 RS/6000 43P 7043 Model 140 Overview 1.3 RS/6000 43P 7043 Model 150 Overview 1.3.1 RS/6000 43P 7043 Model 150 Key Attributes 1.3.2 RS/6000 43P 7043 Model 150 Feature Summary 1.4 RS/6000 43P 7043 Model 260 Overview 1.4.1 RS/6000 43P 7043 Model 260 Key Attributes 1.4.2 RS/6000 43P 7043 Model 260 Feature Summary 1.5 Performance Results 1.5.1 SPEC95 Software Benchmark Page Page 1.5.2 Performance Summary 1.6 Industry Trends and Directions 1.6.1 Microprocessor Future 1.6.2 Universal Serial Bus 1.6.3 The Accelerated Graphics Port 1.6.4 IEEE 1394 1.7 Workgroup Conferencing Page Page 1.8 Year 2000 Page Page Chapter 2. Hardware Overview 2.1 The RS/6000 Platform Architecture 2.1.1 The RS/6000 Platform Architecture Introduction 2.1.2 Platform Topology . . . . . . . . . 2.1.3 RS/6000 Platform Architecture Achievements 2.1.4 RPA Minimum System Requirements 26 platforms that need to support Apple Mac OS. 2.2 The Hardware Design 2.2.1 Hardware Design for the RS/6000 43P 7043 Model 150 Page Page 2.2.2 Hardware Design for the RS/6000 43P 7043 Model 260 30 Figure 9. RS/6000 High Level System Block Diagram (Model 260) planar A planar B Page 2.3 Bus Architecture 2.3.1 The PCI Bus Architecture 2.3.2 The ISA Bus Architecture 2.3.3 The 60X and 6XX Bus 2.3.4 The 6XX-MX I/O Bus 2.3.5 The X-Bus 2.4 The Processor Subsystem 2.4.1 The POWER3 Microprocessor Page 2.4.2 The PowerPC 604e Microprocessor Page 2.5 SMP Hardware Characteristics 2.5.1 Memory Hierarchy Page Page Page Page Page Page Page Page Page Chapter 3. Detailed Product Descriptions 3.1 IBM RS/6000 43P 7043 Model 150 Product Description 3.1.1 Standard Features Page Page Page Page Page 3.1.2 Reliability, Availability, and Serviceability (RAS) Page 3.1.3 Supported Optional Features optional features Page Page Page Page Page Page Page 66 3.1.4 RS/6000 43P 7043 Model 150 Adapter Placement Guidelin es 3.1.5 Service Package Diagnostics CIO - Option Pubs Library English, 3.2 RS/6000 43P 7043 Model 260 Product Description 3.2.1 Model 260 System Architecture 3.2.2 Standard Features Page Page Page Page Page Page Page Page Page 3.2.3 Reliability, Availability, and Serviceability (RAS) Page Page 3.2.4 Supported Optional Features Page Page Page Page Page Page Page Page Page 3.2.5 RS/6000 43P 7043 Model 260 Adapter Placement Guidelin es Page 3.2.6 Service Package CIO - Option Pubs Library English, 3.3 IBM Multimedia Kit for RS/6000 Page Chapter 4. Storage Architectures and Devices 4.1 Storage Boot Devices 4.2 SCSI Overview 4.2.1 SCSI-I 4.2.2 SCSI-II 4.2.3 SCSI-III Page Page 4.2.4 SCSI Terminology Page 4.2.5 SCSI Repeaters 4.2.6 Summary of SCSI Specifications 4.3 SCSI Cabling 4.3.1 General SCSI Cabling Considerations IBM RS/6000 Adapters, Devices and Cables information for Multiple Bus Systems Page Page 4.3.2 Cabling the PCI Single-Ended Ultra SCSI Adapter Page Page Page 4.3.3 Cabling the PCI Differential-Ended Ultra SCSI Adapter Page Page live Table 27 provides a list of available cables for differential adapters. 4.4 Serial Storage Architecture Overview Page 4.6 Internal SCSI Devices 4.6.1 Disk Drives for the Model 150 and Model 260 4.6.2 Internal CD-ROM Drive 122 4.6.3 Internal Tape Drives 4.7 Internal SSA devices 4.8 PCI Storage Adapters 4.8.1 SCSI Adapters 4.8.2 SSA Adapter Page 4.8.3 Storage Adapter Placement Guidelines for Model 150 and 26 0 4.9 External SCSI and SSA Storage Devices Chapter 5. Adapters, Overview and Configuration 5.1 Communication Adapters 5.1.1 Token-Ring Adapter 5.1.2 Ethernet Adapters 5.1.3 ISDN Adapters 5.1.4 FDDI Adapters Page 5.1.5 ATM Adapters Page 5.1.6 Multiple Port Adapters 5.1.7 WAN Adapters 5.1.8 Miscellaneous Adapters 5.2 Graphics Adapters 5.2.1 POWER GXT120P (# 2838) 5.2.2 POWER GXT250P (# 2851) and POWER GXT255P (# 2852) 5.2.3 POWER GXT550P (# 2845) 5.2.4 POWER GXT3000P Graphics Accelerator (# 2825) Page 5.2.5 Graphics Adapter Feature Comparison Page 142 while the maximum on the Model 260 is two. 150 and 260, but covers the slot adjacent to it (uses two slots of space). alpha buffer, stenciling, and accumulation buffering. 5.2.6 Graphics Adapters Attachment Cables Table 35 provides a display cable feature number matrix for the graphics adapters. 5.2.7 Multiple Adapter Support Page 5.2.8 Accessing the Second Display 5.3 Adapter and Device Configuration on PCI-Based RS/6000 Systems 5.3.1 Device Types Managing AIX V.4 on PCI-Based RS/6000 Workstations (40P/43P) Page Page 5.3.2 PCI Adapter Configuration Page 152 5.4 Summary Chart of Adapters Page Page Chapter 6. Diagnostics and System Management Services 6.1 Diagnostics Operating Considerations Page Diagnostics Information for Multiple Bus Systems, 6.2 Stand-Alone Diagnostics 6.2.1 Booting the Stand-Alone Diagnostics CD-ROM 6.2.2 Running Stand-Alone Diagnostics in Concurrent Mode 6.3 On-line Diagnostics 6.3.1 Service Mode 6.3.2 Concurrent Mode 6.3.3 Single-User Mode 6.4 Diagnostic Tasks and Service Aids Page Page Page 6.5 Understanding the Firmware 6.5.1 General RS/6000 Boot Sequence 6.5.2 Typical Boot Sequence for RS/6000 43P 7043 Model 150 6.5.3 Typical Boot Sequence for RS/6000 43P 7043 Model 260 Diagnostic Page 6.6 Power-On Self-Test 6.6.1 Processor POST 6.6.2 Memory DIMM and L2 Cache POST Diagnostic 6.6.3 Graphics Adapter POST 6.6.4 Keyboard and Mouse Controller POST 6.6.5 SCSI Subsystem POST RS/6000 7043 43P Series Service Guide, 6.7 System Management Services (SMS) RS/6000 7043 Model 260 Service Guide, 6.7.1 SMS Start-Up 6.7.2 SMS Graphical Main Menu Page Page Page Page RS/6000 7043 43P Series Service Guide, RS/6000 7043 Model 260 Service Guide, 6.7.3 SMS ASCII Main Menu 6.7.4 SMS Firmware Update Page before DO NOT Page 6.7.5 SMS Firmware Checkpoints RS/6000 7043 43P Series Service Guide, Chapter 7. Service Processor 7.1 Introduction to the Service Processor 7.2 Customize and Access the Service Processor Menus 7.2.1 How to Customize the Service Processor 7.2.2 How to Access Service Processor Menus Locally 7.2.3 How to Access Service Processor Menus Remotely 7.3 Security Within the Service Processor 7.4 Service Processor Operational Phases 7.4.1 Pre-Standby Phase 7.4.2 Standby Phase 7.4.3 Bring-Up Phase 7.4.4 Run-time Phase 7.5 Main Menu 7.5.1 Service Processor Setup Menu Page Page 7.5.2 System Power Control Menu Page no 7.5.3 System Information Menu Page Press Enter to continue and you will see the second screen. Now press Enter to see the last screen. Page Page 7.5.4 Language Selection Menu 7.5.5 CALL-IN/CALL-OUT Setup Menu Page Page Page Page catcher Page 7.5.6 Set System Name 7.6 General User Menu Page 7.7.1 Updating Firmware from the Service Processor Menus 7.7.2 Updating Firmware from the SMS Utilities 7.7.3 Updating Firmware from the Service Aids <filename> 7.7.4 Updating Firmware from AIX 7.8 Service Processor Checkpoints RS/6000 7043 Model 260 Service Guide Page Chapter 8. Hints and Tips 8.1 Electronic Key-Switch Function 8.1.1 bootlist Command 8.2 Entering Debug Mode 8.3 Backup and Cloning 8.3.1 The bootinfo Command 8.3.2 Creating a System Backup 8.3.3 Restoring Your System Backup 8.3.4 Cloning Page Page 3. Create the customization script using an editor. Sample Script: 4. Backup the three files to a diskette: Page 8.3.5 Cloning on AIX Version 4.2 and 4.3 Page Page Page 8.4 Configuration Information 228 Hints and Tips 229 230 Hints and Tips 231 232 Hints and Tips 233 234 The output gives more detailed information about the inventory of your system. PS is the processor speed in hex-number digit. 8.4.1 Information about the Processor 8.4.2 Information about the Service Processor 8.4.3 Information about the Environmental Sensors 8.5 Network Boot Support 8.6 Using the Error Logging Facility 8.7 Booting Problems 8.7.1 Booting from CD-ROM 8.7.2 System Hangs during AIX Boot Process 8.7.3 Recovering a System with No Bootable Media Page Appendix A. RS/6000 43P 7043 Model 140 A.1 RS/6000 43P 7043 Model 140 Key Attributes A.2 RS/6000 43P 7043 Model 140 Feature Summary A.3 Standard Features A.4 Supported Optional Features Page Page Appendix B. Special Notices Page Page Page Appendix C. Related Publications C.1 International Technical Support Organization Publications Exploring IBM RS/6000 Computers A Practical Guide to Serial Storage Architecture for AIX A Technical Introduction to PCI-Based RS/6000 Servers C.4 Web Resources How to Get ITSO Redbooks How IBM Employees Can Get ITSO Redbooks 254 How Customers Can Get ITSO Redbooks IBM Redbook Order Form Page List of Abbreviations C 258 Index Numerics A B C D E F G H I K L M N O P R S T U V W X ITSO Redbook Evaluation