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Connecting to the SCSI Bus

2-13

2

Connecting to the SCSI Bus

You are now ready to connect the adapter to the SCSI bus. 

!

Caution

Single-ended and differential SCSI devices are 
electronically incompatible and cannot be mixed on the 
same physical bus. Mixing single-ended and differential 
SCSI devices on the same bus can cause permanent 
damage to both the peripherals and the PCI adapter.

!

Caution

Cables of different impedance should not be mixed on 
the same physical bus. 

Table 2-3.  Connector and Cable Requirements

Connectors

68-pin Euro style SCSI:

Shielded

 - external or internal cabinet 

applications

Non-shielded

 - internal cabinet 

applications only

Bus Cable

68-conductor, flat ribbon or discrete:

Single-ended

:

Type - Twisted pair only

Shielding - match with connector

Max bus length - 6 meters

Differential:

Type - twisted pair only

Shielding - match with connector

Max bus length - 25 meters

Содержание MPMC101

Страница 1: ...MPMC101 PMC SCSI 2 Adapter User s Manual PMC101A UM1 ...

Страница 2: ...rior written permission of Motorola Inc It is possible that this publication may contain reference to or information about Motorola products machines and programs programming or services that are not announced in your country Such references or information must not be construed to mean that Motorola intends to announce such Motorola products programming or services in your country Restricted Right...

Страница 3: ...or the PCI bus and the SCSI 2 architectures are provided at the end of the chapter Chapter 2 Hardware Installation provides step by step instructions for installing the PCIAdapter in a PCI bus based user stations and servers Installation of the PMC Adapter into motherboards that support a PMC mezzanine architecture is discussed in the latter sections of the chapter Chapter 3 Software Driver Instal...

Страница 4: ...torola sales ofÞce Motorola and the Motorola symbol are registered trademarks of Motorola Inc Interphase is a registered trademark of Interphase Corporation Inc All other products mentioned in this document are trademarks or registered trademarks of their respective holders Copyright Motorola Inc 1995 All Rights Reserved Printed in the United States of America November 1995 ...

Страница 5: ...er to the Glossary at the end of this UserÕs Guide AEN Asynchronous Event Notification CCB Command Control Block CCS Command Control Set CDB Command Descriptor Block CPU Central Processing Unit DMA Direct Memory Access ISA Industry Standard Architecture LU Logical Unit LUN Logical Unit Number MIC Media Interface Connector PCI Peripheral Component Interface SCB SCSI Control Block SCSI Small Compute...

Страница 6: ...le cd usr tmp Pressing the return key Return at the end of the command line entry is assumed when not explicitly shown For example bin su is the same as bin su Return Input required by the user when mixed with program output is printed in bold courier type References to UNIX programs and manual page entries follow the standard UNIX conventions When a user command system prompt or a system response...

Страница 7: ...rsonnel must not remove equipment covers Only Factory Authorized Service Personnel or other qualiÞed maintenance personnel may remove equipment covers for internal subassembly or component replacement or any internal adjustment Do not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed To avoid injuries always discon...

Страница 8: ...NG This equipment generates uses and can radiate electro magnetic energy It may cause or be susceptible to electro magnetic interference EMI if not installed and used in a cabinet with adequate EMI protection ...

Страница 9: ... the Adapter 2 2 Installing the PCI SCSI 2 Adapter 2 3 Installing the PMC SCSI 2 Adapter 2 9 Connecting to the SCSI Bus 2 13 AIX Operating Systems 3 1 Windows NT Operating Systems 3 2 Installing the Windows NT Driver 3 2 Overview 4 1 Start up 4 1 Boot up 4 2 Applications 4 3 PCI and PMC Adapter 4 3 Hardware A 1 Environment A 2 Connectors and Cables A 2 SCSI ÒPÓ Cable Contact Assignments A 3 ...

Страница 10: ...al PCI Adapter 2 6 Inserting the PCI Adapter Card 2 7 Adapter Card Installed to Chassis 2 8 Differential PMC SCSI 2 Adapter 2 9 Single ended PMC SCSI 2 Adapter 2 9 Installing the PMC Adapter 2 10 SCSI Connector Port 2 14 Windows NT Setup 3 2 Windows NT Setup Options Menu 3 3 SCSI Adapter Setup 3 3 Setup Message 3 4 Select SCSI Adapter Option 3 4 Select SCSI Adapter Option 3 5 Installed Adapter Lis...

Страница 11: ...s PCI SCSI 2 Adapter Jumper Settings 2 6 PMC SCSI 2 Adapter Jumper Settings 2 12 Connector and Cable Requirements 2 13 Start up Problems 4 1 Bootup Problems 4 2 Application Problems 4 3 PCI and PMC Adapter Problem 4 3 ...

Страница 12: ...xii ...

Страница 13: ...supported by Motorola The PCI Adapter is a single slot fast and wide SCSI 2 Small Computer System Interface 2 that provides high throughput connectivity for open systems applications The PMC Adapter provides the same level of performance for workstations with embedded PMC PCI Mezzanine Card slots Figure 1 1 PCI SCSI 2 Adapter 68 pin SCSI Connector PCI Connector Face Plate Jumpers JA1 JA2 JA3 ...

Страница 14: ...I 2 Product Features The PCI and PMC Adapters are available with the following capabilities Compliant with PCI Local Bus version 2 1 32 bit zero wait state PCI DMA master Up to 132 Mbps burst DMA rate 20 Mbps Fast and Wide SCSI 2 Differential or Single ended SCSI 2 interfaces Support for up to 30 devices from a single slot 64K EPROM for Network Boot or BIOS Firmware The PCI and PMC Adapters are pl...

Страница 15: ...uter not by the configuration of the system hardware Caution The PCI and PMC Adapters are sensitive to static electricity Do not touch any components or metal parts without using a grounding strap To prevent damage from electrostatic discharge handle the adapter only while wearing a grounding strap System Requirements Minimum system requirements to operate the PCI and PMC Adapters are as follows H...

Страница 16: ... graphic intensive software high speed networks and other high performance peripherals Features of the PCI Local Bus architecture include Processor independent bridge between the CPU and high speed peripherals that serves as a traffic controller between busses 32 bit memory addressing for CPU Direct Memory Access DMA devices and bus masters 32 bit data transfers at 33 MHz for CPU DMA and bus maste...

Страница 17: ... more host computers The main advantage for using SCSI 2 is that all the initialization information is stored within the SCSI 2 device The hostÕs operating system can obtain all the pertinent information about the device without referencing external setup files or software drivers Figure 1 2 Single Initiator Single Target Systems Host Computer Disk Drive Computer Host Adapter SCSI BUS Peripheral S...

Страница 18: ...ove illustrates a simple configuration where a host computer is connected to a single target a disk drive with an embedded SCSI controller The controller can be a stand alone device with multiple peripherals as shown in Figure 1 3 Figure 1 3 Target with Multiple Peripherals Host Computer Printers Computer Host Adapter SCSI BUS Peripheral SCSI Controller SCSI Controller Peripheral Peripheral Periph...

Страница 19: ...on using a 50 conductor 8 bit cable to connect up to 8 SCSI devices on the bus A wide configuration expands the bus to a 68 conductor 16 bit bus that can handle up to 16 SCSI devices They can be intermixed on the same bus Figure 1 4 Multiple Device Configuration Computer Host Adapter SCSI BUS Peripheral SCSI Controller Peripheral Peripheral SCSI Controller Peripheral Peripheral SCSI Controller Per...

Страница 20: ...ed and non shielded cabling can be mixed on the same bus however the non shielded connections should be restricted to internal cabinet applications only All SCSI devices are configured with a socket connector The bus cable consists of the mating pin type connectors Both ends of the bus cable must be properly terminated Interface errors can be reduced if the termination voltage is maintained at the...

Страница 21: ...g the board in a host expansion slot Connecting the adapter board to the SCSI 2 bus Please observe all special notes and precautions For technical specifications on the PCI and PMC Adapters see Appendix A Tools Required The only tools required are a grounding strap and a 1 Phillips head screwdriver Note The PCI SCSI 2 Adapter is a plug and play device with systems that are compliant with the PCI L...

Страница 22: ...t computer To prevent damage to the adapter due to electromagnetic discharge wear a grounding strap and handle the adapter only by the edges Do not touch the components or any metal parts on the adapter except for the metal face plate 1 Open the shipping container and carefully remove its contents Do not open the antistatic bag or clamshell containing the adapter at this time 2 Verify that you hav...

Страница 23: ...alling the PCI SCSI 2 Adapter Warning Your computer operates with voltages that can be lethal Before you remove the computer cover carefully review the steps in this procedure and observe all cautions and warnings to protect yourself and to prevent damage to the system To install the PCI Adapter in a host expansion slot 1 Turn off the computerÕs power switch and unplug the unit from its power sour...

Страница 24: ...2 4 Hardware Installation 2 Figure 2 1 Desktop PCI Slot Configuration Figure 2 2 Expansion Backplate Removal 32 bit PCI slots Expansion backplates Expansion backplate Mounting screw ...

Страница 25: ...Terminators The SCSI bus cable must be properly terminated at each end of the bus The first and last device on the bus should be the only devices that are set to provide this function Terminator Power The SCSI terminators require adequate voltage to properly terminate the cable All SCSI host adapters on the bus should be set to supply terminator power and where possible be located at the end of th...

Страница 26: ... 2 Adapter Jumper Settings Jumper Setting JA1 Supplies terminator power to the SCSI bus JA2 and JA3 Enables the bus terminator Note Both jumpers JA2 and JA3 must be installed to enable the terminator Figure 2 4 Differential PCI Adapter PCB Jumpers ...

Страница 27: ...with dry compressed air 8 Insert the PCI Adapter in the selected slot Firmly press the board into the slot and secure it in place with the screw from the backplate removed in Step 4 9 Take note of the slot position You may need this information when installing the software Figure 2 5 Inserting the PCI Adapter Card PCI SCSI 2 Adapter Mounting Bracket ...

Страница 28: ...dware Installation 2 10 Replace the system cover and connect the PCI Adapter to the SCSI bus as discussed in Connecting to the SCSI Bus on page 2 13 Figure 2 6 Adapter Card Installed to Chassis Mounting screw ...

Страница 29: ...s The PMC I O module capitalizes on the speed and interoperability of the PCI bus standard The PMC Adapter is available in differential or single ended SCSI 2 interfaces Figure 2 7 and Figure 2 8 show the differential and single ended board layouts Figure 2 7 Differential PMC SCSI 2 Adapter Figure 2 8 Single ended PMC SCSI 2 Adapter JA1 P1 P2 LED JA3 JA2 JA4 JA1 P1 P2 LED JA3 JA2 JA4 ...

Страница 30: ...2 10 Hardware Installation 2 Figure 2 9 Installing the PMC Adapter P1 P2 ...

Страница 31: ...motherboardÕs faceplate screws unfastened remove the motherboard from the system chassis 2 Remove the spring metal clip covering the mezzanine aperture on the face plate of the motherboard 3 With a grounding strap attached to your wrist or ankle carefully remove the adapter from its antistatic bag 4 Set the jumpers on the PMC Adapter as described in Table 2 2 Terminators The SCSI bus cable must be...

Страница 32: ... and the PMC Adapter card Fasten the cards together with screws Alignment is facilitated via a metal standoff post on the motherboard and an alignment hole on the adapter card 7 Replace the assembly into the motherboard system chassis slot and connect the PMC Adapter to the SCSI bus as discussed in the following section Table 2 2 PMC SCSI 2 Adapter Jumper Settings Jumper Setting JA1 When jumper is...

Страница 33: ...age to both the peripherals and the PCI adapter Caution Cables of different impedance should not be mixed on the same physical bus Table 2 3 Connector and Cable Requirements Connectors 68 pin Euro style SCSI Shielded external or internal cabinet applications Non shielded internal cabinet applications only Bus Cable 68 conductor flat ribbon or discrete Single ended Type Twisted pair only Shielding ...

Страница 34: ...ard with lug screws Do not over tighten 3 Turn on the power to the computer 4 The installation of the hardware for the PCI and PMC Adapters is complete The next step is to install the software driver Please refer to Chapter 3 for these instructions Figure 2 10 SCSI Connector Port Euro 68 pin Socket Connector Face Plate PCI SCSI 2 ADAPTER PMC SCSI 2 ADAPTER ...

Страница 35: ...X system administrator must now determine the names of the peripheral devices that AIX will assign upon booting up and configure the devices with System Management Integration Tool SMIT The administrator could determine the new SCSI disk device names by using the command line lsdev Cc disk grep i scsi This would indicate all SCSI disks found not just the new ones The new devices indicate that they...

Страница 36: ...g system refer to the Microsoft Windows NT System Guide Before installing the Windows NT Driver verify your system meets the following minimum requirements A Power PC system running Microsoft Windows NT 3 51 or later 16MB total system memory Installing the Windows NT Driver The PCI and PMC Adapters use the NCR 53C825 SCSI controller Drivers for this controller are already included in the Microsoft...

Страница 37: ...rating Systems 3 3 3 2 Click on the Options selection in the Menu Bar to activate the drop down menu 3 Click on the Add Remove SCSI Adapters item Figure 3 2 Windows NT Setup Options Menu Figure 3 3 SCSI Adapter Setup ...

Страница 38: ...e in Figure 3 4 comes to view advising there could be a start up problem after installing a SCSI adapter driver 5 Click on the OK button when ready to continue 6 Use the Down arrow key to select NCR PCI 53c810 Figure 3 4 Setup Message Figure 3 5 Select SCSI Adapter Option ...

Страница 39: ...stems 3 5 3 7 Click the Install button 8 Set the path to the drive and or directory containing the NCR PCI 53c810 driver and click the Continue button Figure 3 6 Select SCSI Adapter Option Figure 3 7 Installed Adapter Listing ...

Страница 40: ...ation routines The driver does not take effect until the computer is restarted The following dialog comes to view to remind you of this necessary action 10 When ready to proceed click the OK button and restart your computer The installation of the software driver is now compete Refer to the NT Disk Administrator for proper formatting and partitioning of your SCSI disks Figure 3 8 Installed Adapter...

Страница 41: ...roblem Possible Solution Computer will not start or come ON 1 Verify that the power on LED on the computer is illuminated 2 Verify that the computer s power cord is intact and is plugged in to an working ac power outlet 3 Check the power source by plugging a known good appliance or unit into the outlet If the system does not operate when plugged into the outlet plug the original unitÕs power cord ...

Страница 42: ...ard also fails check the Read Me item in the Main program group for information about reconfiguring SCSI Adapters Windows NT does not boot 1 Check your setup Delete the NCRC810 SYS file in the NT system32 driver directory If you are running the FAT file system boot the system from a bootable DOS floppy then delete the above file Re install the software driver for the PCI and PMC Adapter as per Cha...

Страница 43: ...ect a hardware conßict check the PCI conÞguration that came with your system to resolve the conßict Table 4 4 PCI and PMC Adapter Problem Problem Possible Solution Host adapter not found The PCI system in your computer is suppose to automatically configure the bus address locations An address conflict is probably not the problem If the driver is correctly installed a driver message should appear o...

Страница 44: ...4 4 Troubleshooting 4 User Notes ...

Страница 45: ...SCSI ID Software settable factory default set 7 SCSI 2 Data Handling Synchronous Fast and Wide SCSI 20 megabytes sec Fast SCSI 10 megabytes sec Asynchronous Fast SCSI 10 megabytes sec Host Data Transfer 32 bit bus master DMA transfers to 132 Mbps Transfer Counter 24 bit RAM 128 Kilobytes of static RAM 1 Kilobyte of NOVRAM FIFO 64 byte DMA FIFO Arbitration 16 bit arbitration Electrical Drivers Sing...

Страница 46: ... feet Storage Sea level 50 000 feet Table A 3 Connector and Cable Requirements Item Requirement Connectors 68 pin Euro style SCSI Shielded external or internal cabinet applications Non shielded internal cabinet applications only Bus Cable 68 conductor flat ribbon or discrete wires Single ended applications Type twisted pair only Shielding match with connector Max bus length 6 meters Differential a...

Страница 47: ...round Ground Ground Ground Ground Ground 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58...

Страница 48: ...7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 51 53 55 57 59 61 63 65 67 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 DB 12 DB 13 DB 14 DB 1...

Страница 49: ...ck of data must be acknowledged before the next block is transmitted Attenuation Signal power lost in a transmission medium as the signal travels from sender to receiver Bus Device Reset A SCSI message to a target that instructs the target to clear all activity Byte An eight bit unit of data It is usually the smallest addressable unit in memory CBR Constant Bit Rate The transmission of bits at a f...

Страница 50: ...ng Unit A personal computer s main microprocessor chip decode The act of recovering the original information from an encoded signal differential Refers to the electrical configuration of the signals used on the SCSI bus A set of two conductors are used to maintain a positive and a negative polarity This technique allows SCSI devices to communicate over longer distances with minimum interference di...

Страница 51: ...ard encode The act of changing data into a series of electrical or optical pulses that can travel efficiently over a medium ES End System A machine intended for running user application programs and connected to a communications medium In a SCSI bus system it is the SCSI device located at each end of the bus preferably a host computer fast SCSI A special set of timing commands for SCSI 2 that allo...

Страница 52: ...n they need to contact another device other than the host to execute a set of commands For example the host could instruct a disk drive to send a file to another disk drive The first disk drive temporarily becomes an initiator while communicating and transferring the file to the second disk drive interoperability The ability of all system elements to exchange information between single vendor and ...

Страница 53: ...n by entering a user name and password LU Logical Unit A physical device or virtual device that is addressed through a target For example a bank of printers connected to a SCSI controller the target are Logical Units LUN Logical Unit Number A 3 bit identifier for a Logical Unit LU Mbps Megabits 1 048 576 bits per second narrow SCSI A 50 conductor SCSI bus with 8 bit communications that can have up...

Страница 54: ... travel across the SCSI bus protocol A set of rules and conventions that govern the exchange of information between communicating devices RAM Random Access Memory The type of computer memory where a byte of data can be read or stored at any location reconnect The arbitration used by a SCSI target to regain control of the bus to continue communications with a SCSI host The previous transmission was...

Страница 55: ...e running on the computer at any given time synchronous transmission A data transmission scheme in which fixed time intervals are used to transmit data across the SCSI bus As opposed to asynchronous transmissions the acknowledgments are used for error checking only target A SCSI device that performs operations in response to a request from an initiator usually the host computer wide SCSI A 68 cond...

Страница 56: ......

Страница 57: ...ance 2 13 lengths 1 8 requirements 2 13 A 2 shielding 1 8 2 13 single ended 2 13 cautions cable impedance 2 13 static electricity 1 3 unpacking adapter 2 2 connecting to SCSI Bus 2 13 connector pin socket 1 8 requirements 2 13 A 2 securing 2 14 shielding 2 13 controller SCSI device 1 6 conventions userÕs guide 6 D differential 1 8 cable 2 13 A 2 contact assignments A 4 defined GL 2 PCI Adapter 2 6...

Страница 58: ...message 3 6 setup 3 2 setup message 3 4 O Overview of adapter 1 1 P PCI defined GL 6 expansion slot 2 3 overview 1 4 requirements 1 3 PMC adapters install 2 10 S SCSI adapter setup 3 3 configurations 1 6 connector port 2 14 connectors 2 13 A 2 controller 1 6 defined GL 6 fast defined GL 3 host adapter 1 6 initiator 1 6 introduction 1 5 narrow 1 7 GL 5 target 1 6 GL 7 terminator power 2 5 terminato...

Страница 59: ...r voltage 1 8 terminators 1 8 PCI Adapter 2 5 PMC Adapter 2 11 troubleshooting 4 1 U unpacking adapter 2 2 V voltage adapter requirements A 1 terminator 1 8 W warnings electrical compatibility 2 13 electrical configuration 2 11 electrical shock 2 3 2 11 electrical versions 2 2 wide configuration 1 7 wide SCSI defined GL 7 Windows NT Opetating System 3 2 ...

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