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Troubleshooting
Related Manuals for Alpha Microsystems AM-6060
Summary of Contents for Alpha Microsystems AM-6060
- Page 1 AM-6060 Computer Owner's Manual ...
- Page 2 © 1998 ALPHA MICROSYSTEMS FIRST EDITION: April 1998 To re-order this document, request part number DSO-00214-00 FCC Notice This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules.
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Page 3: Table Of Contents
Table of Contents CHAPTER 1 - INTRODUCING THE AM-6060 COMPUTER ............1-1 ABOUT THIS BOOK..........................1-2 Graphics Conventions ........................1-2 HARDWARE FEATURES........................1-3 AM-301-10 System Board .........................1-3 AM-176 Board ...........................1-4 Processor ............................1-4 Memory ..............................1-4 Cache Memory ...........................1-4 CMOS Menu Setup ..........................1-4 SCSI and Wide SCSI Disk Drives .....................1-5 External SCSI Port ..........................1-5... - Page 4 CHAPTER 4 - WHERE DO I GO FROM HERE? ................4-1 INTRODUCTION TO AMOS SOFTWARE ..................4-1 The Operating System, AMOS ......................4-1 Networking............................4-1 Programming Languages........................4-2 Text Preparation ..........................4-2 Utility Programs ..........................4-2 Application Programs.........................4-2 Office Information Products ......................4-3 AM-6060 Computer Owner's Manual, Rev. 00...
- Page 5 Procedure #1: Check Power and Activity Lights ................7-3 Procedure #2: Check the Computer Status Codes................7-4 Procedure #3: Power-up/Reset......................7-5 Procedure #4: Check Terminal/Printer ....................7-6 Procedure #5: Self Test ........................7-8 Procedure #6: Alternate Boot......................7-10 USING LEVEL7 ..........................7-10 AM-6060 Computer Owner's Manual, Rev. 00...
- Page 6 APPENDIX E - READ-AHEAD AND WRITE BUFFERING ............E-1 INTRODUCTION..........................E-1 READ-AHEAD............................. E-1 Controlling Read-Ahead ........................E-2 WRITE BUFFERING ........................... E-2 Potential Pitfalls ..........................E-3 Setting Up Write Buffering....................... E-3 FINAL NOTES ............................. E-4 INDEX AM-6060 Computer Owner's Manual, Rev. 00...
- Page 7 List of Illustrations Figure 2-1: Front Panel Controls and Indicators..................2-4 Figure 2-2: AM-6060 Rear Panel Configuration ..................2-5 Figure 3-1: DAT Tape Drive........................3-11 Figure 5-1: Simple Initialization File......................5-6 Figure D-1: Active External Terminator Installation ................D-1 List of Tables Table 1-1: Graphics Conventions ......................
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Page 8: Chapter 1 - Introducing The Am-6060 Computer
The system can be field upgraded to provide more disk storage, memory, and tape backup capacity. The AM-6060 is housed in a compact enclosure that fits neatly next to a desk, as shown below: Figure 1-1: AM-6060 Chassis... -
Page 9: About This Book
• Chapter 8 lists the computer status codes you may see on the front panel display. • Several appendices contain technical information, including instructions for cable installation. The AM-6060 Service Manual contains additional information on opening and configuring your computer. The service manual is intended for authorized technical personnel only. -
Page 10: Hardware Features
Table 1-1: Graphics Conventions HARDWARE FEATURES The AM-6060 uses a two-board combination, the AM-176 and the AM-301-10 boards, to provide high performance and added versatility. A number of physical components go into your AM-6060 computer to give it the ability to process, input, display, and store data. The following sections highlight some of these components. -
Page 11: Am-176 Board
AM-6060 computers have an MC68060 processor running at 66MHz. Memory The AM-176 board in the AM-6060 has four sockets in which main memory SIMMs (Single Inline Memory Modules) are installed. You must always install SIMMs in pairs of equal capacity. The AM- 6060 supports a minimum of 8MB of memory and a maximum of 512MB. -
Page 12: Scsi And Wide Scsi Disk Drives
SCSI and Wide SCSI Disk Drives The SCSI controller in the AM-6060 provides two bus interfaces, each originating at a connector on the AM-176 board. One is a 50-pin SCSI bus interface, the second is a 68-pin Wide SCSI bus interface. Both interfaces support Alpha Microsystems SCSI disks, streamer tapes, DAT tapes, CD-ROMs and the AM- 642 SCSI to Pertec Converter for ½"... -
Page 13: Scsi Tape Drives
The AM-176 board provides a high-performance Ethernet interface through a 10BaseT connector. Using the standard AlphaTCP TCP/IP software, you can connect via this interface to a local network, WAN, or the Internet. The AM-6060 is specifically designed to have its users connected via the Ethernet rather than serial I/O ports. -
Page 14: Real Time Clock
• AlphaTCP allows your Alpha Micro computer to communicate using the TCP/IP protocol. This allows you to use networked PCs as I/O terminals on the AM-6060, connect to the Internet, send and receive mail, and transfer files. -
Page 15: Service Information
Micro Technical Assistance Center. To arrange for on-site warranty service at your location, contact your Alpha Micro VAR or AMSO service organization. In addition to the warranty service provided, support is available through Alpha Microsystems Services Operation (AMSO), our nationwide field service organization. AMSO provides direct repair services to Alpha Micro computer owners. -
Page 16: Chapter 2 - Installation
Unpack the terminal which will serve as the operator terminal and set it aside for now. What You Will Need When you unpack your computer you should find the following items: • Documentation, including this manual, and warranty cards • The main enclosure • One AC power cord AM-6060 Computer Owner's Manual, Rev. 00... -
Page 17: Reporting Shipping Damage
In addition to the equipment Alpha Micro has provided and the operator terminal, you may need the following: 1. Cabling and any additional hardware to attach your AM-6060 to your Ethernet network. 2. Any new PCs, workstations, or other devices you’ll be adding to your network to use with the AM-6060. -
Page 18: Recording The Ssd Identification Number
The Software Security Device (SSD) is a customized integrated circuit located on the AM-301-10 board inside your AM-6060 computer. The SSD uniquely identifies your computer to customized software that has been configured to run only on your computer. If you purchase customized software from your VAR or other software vendors, you may need to give them your SSD identification number (printed on the SSD chip itself) before they can "key"... -
Page 19: Front Panel Controls And Indicators
• The H.D.D. light is lit whenever there is activity on the SCSI bus: the computer is reading from or writing to a disk or tape. Two-character display Turbo button Power light System activity light Reset button SCSI activity light Figure 2-1: Front Panel Controls and Indicators AM-6060 Computer Owner's Manual, Rev. 00... -
Page 20: Am-6060 Rear I/O Panel Configurations
Figure 2-2: AM-6060 Rear Panel Configuration The cutouts which are covered on your back panel are for options which do not apply to the AM-6060— this panel is also used for other Alpha Micro computers. As shown, the back panel offers connectors for the four on-board serial ports, the Ethernet connection, and an external SCSI connector. -
Page 21: Preparing The Site
Environmental Specifications • Computer external operating temperature: 60 to 90 degrees F (16 to 32.2 degrees C) • Humidity: 10% to 90% (non-condensing) AM-6060 Computer Owner's Manual, Rev. 00... -
Page 22: Static Electricity And Grounding
If problems occur when equipment near the computer is turned on—for example, if your computer stops functioning when someone uses the photocopier—improper grounding could be your problem. We recommend a low impedance power conditioner to filter out these power problems. Alpha Microsystems can provide the approved power conditioner type. Ask your VAR for further details. -
Page 23: Verifying Voltage Compatibility
States use 115 Volt electricity. Many other areas of the world use 220—240 Volt electricity. The AM-6060 can work with either voltage if its input voltage switch is set correctly. The switch is on the power supply near the top of your computer’s back panel. Verify the input voltage setting before plugging in your computer. -
Page 24: Turning The Computer On
AMOS also assumes the following terminal parameters: Data Word Length: Eight data bits Parity: No parity Stop Bit (other than 110 baud): One stop bit AM-6060 Computer Owner's Manual, Rev. 00... -
Page 25: Connecting The Cable
CPU and which end goes to the terminal. INITIAL TESTING Before you boot the computer under AMOS, connect the AM-6060 to your network, or hook up any additional serial devices to the other three serial ports, you should use the self test feature to verify that the hardware is working correctly. -
Page 26: Testing Your Network Connection
AM-6060 from any networked PC. Before you start, you need the IP address of the AM-6060. Alpha Micro sets this to the address you requested, or to a default address. The IP address is listed on the AM-6060 Network Server Configurator. -
Page 27: The Warm Boot Monitor
Instead of modifying the file directly, make a copy, then edit and test the copy. Replace the original file only when you know the copy works correctly. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 28: Getting Assistance
Installation Page 2-13 With the AM-6060, adding new users to your computer is normally a matter of adding a new workstation to your Ethernet network. This may involve modifying the system initialization command file and/or one or more of the configuration file used by AlphaTCP. Please see the AlphaTCP Administrator’s Guide for AlphaTCP setup information. -
Page 29: Chapter 3 - Getting Started
AM-6060 CMOS SETUP PROCEDURE When booting, the AM-6060 uses data stored in its CMOS parameters to find the primary and alternate boot devices, the system monitor and initialization files to use, and other system options. The CMOS RAM is provided on the AM-301-10 board;... -
Page 30: Am-6060 Initialization Routine
. The CMOS menu looks like this; the values shown are the ones set at the factory for an AM-6060: ALPHA MICROSYSTEMS AM-6060 - Roadrunner 060 CMOS Configuration Menu Primary boot device type ..SCSI Disk Primary boot device unit # . -
Page 31: Primary Boot Device Type
Besides the preset initialization file, AM6060.INI, your computer has an AMOS32.INI file which defines only a single user and does not start the AlphaTCP networking software. Other sample initialization files may also be included. Please see Chapter 5 for more about initialization files. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 32: Saving The Cmos Settings
For example, if your computer contains one hard disk drive split into three logical devices, and a second hard drive divided into six logical devices: AM-6060 Computer Owner's Manual, Rev. 00... -
Page 33: The System Disk
For example, you may have the account [63,1] on both DSK0: and DSK1:. Though these accounts have the same account number, since they are on different devices they are different accounts, and contain different files. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 34: Logging On
People accessing the AM-6060 using networking and terminal emulation software from their PCs may have to use a command (or click an icon) to connect to the AM-6060, and enter information about the type of connection they want, before logging on as described here. -
Page 35: The Terminal Keyboard
By holding down , you can type upper case letters and the symbols on the upper half of the keys with two symbols. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 36: Correcting Typing Mistakes
ENTER Your particular terminal or workstation undoubtedly has many features we haven't covered in this section. For complete information on using your terminal or workstation, refer to the owner's manual that accompanied it. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 37: About Streaming Tape
QIC-1000 QIC-2GB AM-625 AM-626 AM-627 AM-628 AM-650 Table 3-3: Supported ¼" Tape Formats The AM-650 also supports QIC-5010 and QIC 5010C formats with 13GB tapes. Some software may have further restrictions on tape format. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 38: Loading And Unloading Tape Cartridges
2. The tape inserts as shown below. As you insert the tape through the tape door, the DAT drive takes over the load operation by mechanically pulling the tape cartridge into the load position, just like your home VCR. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 39: Figure 3-1: Dat Tape Drive
4. To unload the tape cartridge from the DAT drive, press the tape eject button, which is shown above. The drive will automatically eject the tape. For information on maintaining the DAT drive, see Chapter 6. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 40: Chapter 4 - Where Do I Go From Here
AMOS, the Alpha Micro Operating System, supervises all of the programs that run on your computer. Regular updates to the AMOS operating system and its accompanying software are available from your VAR. There are different revision levels of AMOS; to use the AM-6060 you need AMOS 2.3A or later. Networking The networking software is included with AMOS. -
Page 41: Programming Languages
Please see your VAR for details. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 42: Office Information Products
If you have never used a computer before, we recommend you read the AMOS User's Guide. This book is a practical introduction to the Alpha Micro computer, containing instructions for many of the procedures you'll use every day. It expands on many of the topics discussed in Chapter 3. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 43: I Want To Learn How To Maintain My Computer
AlphaTCP. "I Want to Do Text Processing" If you want to use your AM-6060 to prepare documents, there are several books you should look at: The AlphaVUE User's Manual for information on the AlphaVUE screen-oriented text editor; the TXTFMT User's Manual for information on the TXTFMT text formatting program;... -
Page 44: Chapter 5 - System Administration
Keep this warm boot media in a safe place in case you need it. You can use the WRMGEN program to create a warm boot tape. For more information on warm boot monitors, see the System Operator's Guide. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 45: Disk Accounts
OPR: for DSK0:[1,2]. So, whenever you need to log in the account DSK0:[1,2], you can type LOG OPR: instead. The AMOS User's Guide contains more RETURN information on ersatz names and how you can use them. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 46: Adding New Accounts
SYSACT returns you to AMOS command level and the AMOS prompt symbol appears on your screen. For complete information on using the SYSACT command, see the SYSACT reference sheet in the System Commands Reference Manual. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 47: Adding User Names
As described in Chapter 3, you set the name of the initialization file by using the CMOS setup feature. When it ships from Alpha Microsystems, the AM-6060 is set to use an initialization file called AM6060.INI. You can continue to use this name for your initialization file, switch to one of the other provided initialization files, or create a file with a different name and start using it. - Page 48 Do not change any lines in the system initialization file other than those discussed below until you're familiar with the documentation on the file in the System Operator's Guide to the System Initialization Command File. Here is a sample simple initialization file: AM-6060 Computer Owner's Manual, Rev. 00...
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Page 49: Adding Users
Figure 5-1: Simple Initialization File Adding Users There are two types of users you may want to add to your AM-6060: • Someone using a workstation, connected to the AM-6060 via Ethernet. • Someone using one of the four serial ports. -
Page 50: Network Users
Serial Users The AM-6060 includes only four serial ports. Port 0 is used for the boot terminal; ports 1 - 3 can be used for terminals, printers, or modems. You don’t really need to “add” users for these ports; they are already defined in AM6060.INI, and all the system parameters allow for them being used. -
Page 51: Changing User Memory
“pool” of memory for network jobs. When someone connects to the AM-6060, memory is taken from this pool and assigned to that network user; when the user disconnects, the memory is returned to the pool. -
Page 52: Multiple Initialization Files
If you decide to change the amount of memory allocated to a job, or the memory pool, you can modify the system initialization file following the instructions below. Be very careful when changing memory allocations. Most of the memory on an AM-6060 is used for AlphaTCP processes and users connected via the network, and allocating memory incorrectly could make it impossible for some or all network users to access the computer. -
Page 53: Analyzing The Disk
2. If you don't want REDALL to read all blocks on the disk, follow the disk specification with the number of blocks you want read: RETURN REDALL DSK2:100 The command above tells REDALL to read the first 100 blocks on DSK2:. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 54: The Dskana Command
For example, to analyze DSK1:, type: DSKANA DSK1: RETURN You now see: [Begin analysis of DSK1:] As DSKANA checks the disk, it displays the disk account numbers. When it finishes, it displays the results of its analysis. For example: AM-6060 Computer Owner's Manual, Rev. 00... -
Page 55: Dskana Options
As mentioned above, you need to use the /L or /E option to find the location of any file errors DSKANA detects. The /C option is discussed in the next section. To see the list of DSKANA options, type DSKANA RETURN without specifying a device name. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 56: The Check Option And Automatic Backups
System Commands Reference Manual for instructions on formatting a disk drive. Be extremely careful when using the FMTS2 command. Formatting a disk drive will delete all data and system files on it! It is important that only a certified technician perform these tasks. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 57: Chapter 6 - Preventive Maintenance
• When you use new tapes exclusively or often, clean the head after every two hours of tape drive running time. • If you reuse tapes most of the time, clean the head after every eight hours of running time. For the AM-62x streaming tape drives, follow these cleaning procedures: AM-6060 Computer Owner's Manual, Rev. 00... -
Page 58: Dat Drive Cleaning
Remember, however, that if any liquid makes its way inside the enclosure, severe damage to the computer could result. So, a light dusting is the safest cleaning procedure, and probably all the main enclosure will require. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 59: Chapter 7 - Troubleshooting Procedures
(Procedure #1) [ ] Check the System Status Codes (Procedure #2) [ ] Power-up/Reset (Procedure #3) [ ] Check Terminal/Printer (Procedure #4) [ ] Self Test (Procedure #5) [ ] Alternate Boot (Procedure #6) AM-6060 Computer Owner's Manual, Rev. 00... -
Page 60: Symptom #2: Scrambled Characters On The Terminal Screen
The following pages define the various troubleshooting procedures listed in the previous section. We assume you are familiar with the placements of various buttons and switches on the computer, such as the reset and power buttons; if not, refer to the illustrations in Chapter 2. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 61: Procedure #1: Check Power And Activity Lights
Perform "Procedure #5: Self Test." Call your VAR with the results of the self test and ask for help. Stop. No problem was found in this section. Please perform the next procedure on your checklist. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 62: Procedure #2: Check The Computer Status Codes
The computer has encountered an error, perhaps due to faulty memory or addressing. Perform "Procedure #5: Self Test." If your computer does not pass the self test, call your VAR with the information from the test. Stop. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 63: Procedure #3: Power-Up/Reset
D. If the computer did not boot successfully, turn the computer off and back on again, following these steps: AM-6060 Computer Owner's Manual, Rev. 00... -
Page 64: Procedure #4: Check Terminal/Printer
Reset the computer. If it comes up normally, and there is no problem with the terminal, you know one of the other terminals may be the problem. Connect another terminal and go to Step D again. Repeat until you find the problem terminal. AM-6060 Computer Owner's Manual, Rev. 00... - Page 65 You were not able to find a specific problem with the terminal. Call your VAR if you still suspect a problem with your terminal. Return to the current procedure or go on to the next procedure on your checklist. AM-6060 Computer Owner's Manual, Rev. 00...
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Page 66: Procedure #5: Self Test
As each test finishes, note whether the component being tested passed or failed. If an error occurs during the Memory Test, the addresses of the errors display on the screen. Jot them down on the Self Test Checker. Stop the self test at an appropriate time. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 67: Table 7-1: Self Test Checker (1)
Blinking A0/1/2* A9/11 AA/11 Ab/11 Table 7-2: Self Test Checker (2) A / indicates two codes blink alternately. An * indicates the code is in the range shown. X stands for any single digit. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 68: Procedure #6: Alternate Boot
AM-6060s are), you can start LEVEL7 by pressing the Turbo button on the computer’s front panel (see Figure 2-1). The Turbo button is a toggle switch; when you press it, the AM-6060 enters a LEVEL7 state, and will run only LEVEL7. Press the Turbo button again to enable your computer to boot and run normally. -
Page 69: Chapter 8 - Status Display Codes
Some of these codes may also occur any time the computer is running. If you have a problem with your computer, check the front panel; if there is a code displayed, look it up in this table to help diagnose the problem. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 70: Table 8-1: Front Panel Status Codes
2E error code. If an error occurs here, your computer might have a bad PROM or bad memory. Contact your VAR. Table 8-1: Front Panel Status Codes AM-6060 Computer Owner's Manual, Rev. 00... - Page 71 While booting: reading the Master File Directory (MFD) from the primary boot device. An error at this point indicates disk problems. During normal operation: unimplemented integer instruction encountered. Front Panel Status Codes (continued) AM-6060 Computer Owner's Manual, Rev. 00...
- Page 72 UPS is bypassed and batteries are low. UPS inverter is running and a low battery condition exists. Only 2 minutes of power remaining! System shutdown is imminent. Not valid, system dead. Front Panel Status Codes (continued) AM-6060 Computer Owner's Manual, Rev. 00...
- Page 73 System has detected an attempt to write outside of the supervisor stack area. On boot-up, memory is being cleared and sized. Bus error was encountered. Address error was encountered. Illegal instruction was encountered. CHK instruction. Front Panel Status Codes (continued) AM-6060 Computer Owner's Manual, Rev. 00...
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Page 74: Self Test Feature
Because the operation of the self test and the codes displayed by the self test differ depending on the version of the boot PROMs contained in your computer, the appropriate self test information for your computer can be found in the System Self Test User's Guide that was shipped with your computer. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 75: Appendix A - Connector Configurations
Appendix A - Connector Configurations The rear panel of your AM-6060 contains four serial connectors for the four serial ports found on the AM-301-10 board, in addition to the RJ-45 10BaseT Ethernet connector for attaching your AM-6060 to your network. This appendix discusses connector and cable considerations for both network and serial connections. -
Page 76: Serial I/O Connectors
Alpha Micro for connecting the serial ports to various types of device. What Is RS-232? All AM-6060 serial ports support RS-232. RS-232 is a standard developed by the Electronic Industry Association (EIA) to encourage standardized interfacing of devices to computer systems (RS stands for Recommended Standard). -
Page 77: Cable Construction Guidelines
CABLES AVAILABLE FROM ALPHA MICRO The serial ports on the AM-6060 use the same plug-and-play external cabling kits as the AM-359 serial I/O boards. The list below gives the part number and a brief description of each cabling kit available for the AM-6060. - Page 78 • PDB-00359-55—Four modular RJ-45 to female DB9 adapters for connecting a PC-AT style serial port to an AM-6060. This kit requires a shielded parallel patch cord with RJ-45 connectors at each end, like the 10-foot PRA-00189-10 cable supplied in the PDB-00359-56 cabling kit described below.
- Page 79 WHT/BRN SLT/WHT SHLD SHLD BRN/WHT CRT or printer busy PDB-00359-54 External Cabling Kit PDB-00359-55 Use this kit to connect a PC-AT style serial port to an AM-6060. FEMALE DB9 PARALLEL PATCH CORD ADAPTER = PC-AT AM-6060 SIGNAL PAIR # RJ-45...
- Page 80 Use this kit to connect to existing DB-9 male connectors. FEMALE DB9 AM-6060 FOUR FOOT CABLE AM-355 SIGNAL PAIR # RJ-45 SIGNAL PINOUTS WHT/BLU BLU/WHT WHT/ORG ORG/WHT WHT/GRN GRN/WHT WHT/BRN SHLD SHLD BRN/WHT PDB-00359-57 External Cabling Kit AM-6060 Computer Owner's Manual, Rev. 00...
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Page 81: Appendix B - The Control Characters
While a Control-S is in effect, AMOS stores, but does not act upon, anything you type except for . There is, however, a limit to how much can be CTRL stored. The exact number of characters depends on your initial system setup. AM-6060 Computer Owner's Manual, Rev. 00... - Page 82 This is a great convenience if you want to enter a series of similar commands; you can just keep making minor changes to one command, and reusing it. AM-6060 Computer Owner's Manual, Rev. 00...
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Page 83: Appendix C - Super I/O
Super I/O is designed to significantly increase character output for all serial ports using the AM318.IDV driver. This includes the AM-6060's four on-board serial ports. Super I/O handles character output in a much more efficient manner than any other previously released AMOS serial port driver, which reduces the load on the CPU and makes more CPU cycles available for other tasks. -
Page 84: Appendix D - Scsi Termination
Using an external terminator makes installing an add-on subsystem (like a portable CD-ROM drive) easier, eliminating the need to remove terminators from a SCSI device located in the host computer. In the AM-6060, the external terminator must be an “active” terminator. An active terminator is included with your AM-6060. -
Page 85: Attaching External Devices
SCSI specifications. If you want to attach more than one external device, you need to install a Wide SCSI repeater inside the AM-6060 chassis. For more information, please see AM-441 Wide SCSI Repeater Installation Instructions, PDI-00441-00. Depending on your configuration, you may need a repeater even if you have only one external device. -
Page 86: Appendix E - Read-Ahead And Write Buffering
For example, data base searches and programs like REDALL may execute much faster because the data they require is already in memory and only has to be transferred from the cache into the user partition. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 87: Controlling Read-Ahead
If the program then writes the next sequential block, the system must wait the latency time of the drive (i.e., the time it takes the drive to complete one revolution) before the next block can be written. Latency, even on fast SCSI-2 drives, is around 7ms. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 88: Potential Pitfalls
SYSTEM statement used to load the SCSI disk driver into system memory. Append "/N" followed by the buffer size and flush period enables write buffering for that device. The syntax is: SYSTEM DVR:dev/N buffer-size flush-period AM-6060 Computer Owner's Manual, Rev. 00... -
Page 89: Final Notes
AM-176 CPU and SCSI subsystem differently than your application does; therefore we highly recommend you experiment with cache and write buffer sizes, read-ahead blocks, and flush periods on an installed system to find the best possible combination for that system. AM-6060 Computer Owner's Manual, Rev. 00... -
Page 90: Index
· 3-3 system initialization file · 2-12, 3-3, 5-4, 5-7 warm boot · 2-12 CPU · 1-4 Buffer size · E-4 Buffering features · E-1 read ahead · E-1, E-2 write · E-2 AM-6060 Computer Owner's Manual, Rev. 00... - Page 91 AlphaTCP requirements · 5-8 error · 7-9 external cache · 1-4 instruction and data · 1-4 pool · 5-8 SIMMs · 1-4 Graphics conventions · 1-2 MEMORY command · 5-9 Grounding · 2-7 MULTI · 4-3 AM-6060 Computer Owner's Manual, Rev. 00...
- Page 92 RJ-45 connector · A-1, A-2 parameters · 2-9, 7-7 RS-232 TRMDEF statement · C-1 cables · A-2 troubleshooting · 7-6 definition · A-2 Testing line voltages · 2-7 standard · A-2 Text processing · 4-4 AM-6060 Computer Owner's Manual, Rev. 00...
- Page 93 · 1-5, D-1 Turning on power · 2-9 Word processing · 4-4 TXTFMT · 4-2, 4-4 Write buffering · E-1, E-2, E-3 setting up · E-3 WRMGEN program · 5-1 Unpacking · 2-1 AM-6060 Computer Owner's Manual, Rev. 00...
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