|
|
Home | Switchboard | Unix Administration | Red Hat | TCP/IP Networks | Neoliberalism | Toxic Managers |
| (slightly skeptical) Educational society promoting "Back to basics" movement against IT overcomplexity and bastardization of classic Unix | |||||||
You can run various hardware diagnostics in OpenBoot to troubleshoot hardware and network problems. The diagnostic commands are listed in Table 3.13.
| Command | Description |
| probe-scsi | Identifies devices attached to a SCSI bus. |
| probe-ide | Identifies IDE devices attached to the PCI bus. |
| test <device-specifier> | Executes the specified device's self-test method. For example, test floppy tests the floppy drive (if installed), and test net tests the network connection. |
| test-all <device-specifier> | Tests all devices that have built-in self-test methods below the specified device tree node. If <device-specifier> is absent, all devices beginning from the root node are tested. |
| watch-clock | Tests the clock function. |
| watch-net | Monitors the network connection. |
The following examples use some of the diagnostic features of OpenBoot.
To identify peripheral devices currently connected to the system, such as disks, tape drives, or CD-ROMs, you use OpenBoot probe commands. To identify the various probe commands and their syntax, you use the OpenBoot sifting command, as follows:
sifting probe
The system responds with this:
(f006c444) probe-all (f006bf14) probe-pci-slot (f006baa4) probe-scsi-all (f0060de8) probe-pci . . . <output has been truncated>
The OpenBoot sifting command, also called a sifting dump, searches OpenBoot commands to find every command name that contains the specified string.
This first example uses the OpenBoot probe command, probe-scsi, to identify all the SCSI devices attached to a particular SCSI bus:
ok probe-scsi
This command is useful for identifying SCSI target IDs that are already in use or to make sure that all devices are connected and identified by the system. The system responds with this:
Target 1
Unit 0 Disk SEAGATE ST1120N 833400093849
Copyright 1992 Seagate
All rights reserved 0000
Target 3
Unit 0 Disk MAXTOR LXT-213S SUN2074.20
This example uses the probe-ide command to identify all IDE devices connected to the PCI bus:
ok probe-ide
Device 0 ( Primary Master )
ATA Model: ST34321A
Device 1 ( Primary Slave )
Not Present
Device 2 ( Secondary Master )
Removable ATAPI Model: CRD-8322B
Device 3 ( Secondary Slave )
Not Present
NOTE
OpenBoot probe Commands The most common OpenBoot probe commands are probe-scsi and probe-scsi-all, which are used to obtain a free open SCSI target ID number before adding a tape unit, a CD-ROM drive, a disk drive, or any other SCSI peripheral. Only devices that are powered on will be located, so you need to make sure everything is turned on. You can use this command after installing a SCSI device to ensure that it has been connected properly and that the system can see it. You can also use this command if you suspect a faulty cable or connection. If you have more than one SCSI bus, you use the probe-scsi-all command.
This example tests many of the system components, such as video, the network interface, and the floppy disk:
ok test all
To test the disk drive to determine whether it is functioning properly, you put a formatted, high-density disk into the drive and type the following:
ok test floppy
The system responds with this:
Testing floppy disk system. A formatted disk should be in the drive. Test succeeded.
You type eject-floppy to remove the disk.
Table 3.14 describes other OpenBoot commands you can use to gather information about the system.
| Command | Description |
| banner | Displays the power-on banner |
| show-sbus | Displays a list of installed and probed SBus devices |
| .enet-addr | Displays the current Ethernet address |
| .idprom | Displays ID PROM contents, formatted |
| .traps | Displays a list of SPARC trap types |
| .version | Displays the version and date of the startup PROM |
| .speed | Displays CPU and bus speeds |
| show-devs | Displays all installed and probed devices |
The following example uses the banner command to display the CPU type, the installed RAM, the Ethernet address, the host ID, and the version and date of the startup PROM:
ok banner
The system responds with this:
Sun Ultra 5/10 UPA/PCI (UltraSPARC-IIi 270MHz), Keyboard Present OpenBoot 3.15, 128 MB memory installed, Serial #10642306. Ethernet address 8:0:20:a2:63:82, Host ID: 80a26382.
This example uses the .version command to display the OpenBoot version and the date of the startup PROM:
ok .version
The system responds with this:
Release 3.15 Version 2 created 1998/11/10 10:35 OBP 3.15.2 1998/11/10 10:35 POST 2.3.1 1998/08/07 16:33
This example shows how to use the .enet-addr command to display the Ethernet address:
ok .enet-addr
The system responds with this:
8:0:20:1a:c7:e3
NOTE
Checking the OpenBoot Version from a Shell Prompt You can display the OpenBoot version from a shell prompt by typing this:
/usr/platform/´uname –m´/\sbin/prtdiag –v
To display the CPU information, type the following:
.speed
The system responds with this:
CPU Speed : 270.00MHz UPA Speed : 090.00MHz PCI Bus A : 33MHz PCI Bus B : 33MHz
The console is used as the primary means of communication between OpenBoot and the user. The console consists of an input device that is used for receiving information supplied by the user and an output device that is used for sending information to the user. Typically, the console is either the combination of a text/graphics display device and a keyboard, or an ASCII terminal connected to a serial port.
The configuration variables that are related to the control of the console are listed in Table 3.15.
| Variable | Description |
| input-device | Specifies the console input device (usually keyboard, ttya, or ttyb). |
| output-device | Specifies the console output device (usually screen, ttya, or ttyb). |
| screen-#columns | Specifies the number of onscreen columns. The default is 80 characters per line. |
| screen-#rows | Specifies the number of onscreen rows. The default is 34 lines. |
If you select keyboard for input-device and the device is not plugged in, input is accepted from the ttya port as a fallback device. If the system is powered on and the keyboard is not detected, the system looks to ttya—the serial port—for the system console and uses that port for all input and output.
You can define the communication parameters on the serial port by setting the configuration variables for that port. These variables are shown in Table 3.16.
| Variable | Default Value |
| ttyb-rts-dtr-off | false |
| ttyb-ignore-cd | true |
| ttya-rts-dtr-off | false |
| ttya-ignore-cd | true |
| ttyb-mode | 9600,8,n,1,- |
| ttya-mode | 9600,8,n,1,- |
The value for each field of the ttya-mode variable is formatted as follows:
<baud-rate>,<data-bits>,<parity>,<stop-bits>,<handshake>
The values for these fields are shown in Table 3.17.
| Field | Values |
| <baud-rate> | 110, 300, 1200, 4800, 9600, 19200 |
| <data-bits> | 5, 6, 7, 8 |
| <parity> | n (none), e (even), o (odd), m (mark), s (space) |
| <stop-bits> | 1, 1.5, 2 |
| <handshake> | (none), h (hardware: rts/cts), s (software: xon/xoff) |
Society
Groupthink : Two Party System as Polyarchy : Corruption of Regulators : Bureaucracies : Understanding Micromanagers and Control Freaks : Toxic Managers : Harvard Mafia : Diplomatic Communication : Surviving a Bad Performance Review : Insufficient Retirement Funds as Immanent Problem of Neoliberal Regime : PseudoScience : Who Rules America : Neoliberalism : The Iron Law of Oligarchy : Libertarian Philosophy
Quotes
War and Peace : Skeptical Finance : John Kenneth Galbraith :Talleyrand : Oscar Wilde : Otto Von Bismarck : Keynes : George Carlin : Skeptics : Propaganda : SE quotes : Language Design and Programming Quotes : Random IT-related quotes : Somerset Maugham : Marcus Aurelius : Kurt Vonnegut : Eric Hoffer : Winston Churchill : Napoleon Bonaparte : Ambrose Bierce : Bernard Shaw : Mark Twain Quotes
Bulletin:
Vol 25, No.12 (December, 2013) Rational Fools vs. Efficient Crooks The efficient markets hypothesis : Political Skeptic Bulletin, 2013 : Unemployment Bulletin, 2010 : Vol 23, No.10 (October, 2011) An observation about corporate security departments : Slightly Skeptical Euromaydan Chronicles, June 2014 : Greenspan legacy bulletin, 2008 : Vol 25, No.10 (October, 2013) Cryptolocker Trojan (Win32/Crilock.A) : Vol 25, No.08 (August, 2013) Cloud providers as intelligence collection hubs : Financial Humor Bulletin, 2010 : Inequality Bulletin, 2009 : Financial Humor Bulletin, 2008 : Copyleft Problems Bulletin, 2004 : Financial Humor Bulletin, 2011 : Energy Bulletin, 2010 : Malware Protection Bulletin, 2010 : Vol 26, No.1 (January, 2013) Object-Oriented Cult : Political Skeptic Bulletin, 2011 : Vol 23, No.11 (November, 2011) Softpanorama classification of sysadmin horror stories : Vol 25, No.05 (May, 2013) Corporate bullshit as a communication method : Vol 25, No.06 (June, 2013) A Note on the Relationship of Brooks Law and Conway Law
History:
Fifty glorious years (1950-2000): the triumph of the US computer engineering : Donald Knuth : TAoCP and its Influence of Computer Science : Richard Stallman : Linus Torvalds : Larry Wall : John K. Ousterhout : CTSS : Multix OS Unix History : Unix shell history : VI editor : History of pipes concept : Solaris : MS DOS : Programming Languages History : PL/1 : Simula 67 : C : History of GCC development : Scripting Languages : Perl history : OS History : Mail : DNS : SSH : CPU Instruction Sets : SPARC systems 1987-2006 : Norton Commander : Norton Utilities : Norton Ghost : Frontpage history : Malware Defense History : GNU Screen : OSS early history
Classic books:
The Peter Principle : Parkinson Law : 1984 : The Mythical Man-Month : How to Solve It by George Polya : The Art of Computer Programming : The Elements of Programming Style : The Unix Hater’s Handbook : The Jargon file : The True Believer : Programming Pearls : The Good Soldier Svejk : The Power Elite
Most popular humor pages:
Manifest of the Softpanorama IT Slacker Society : Ten Commandments of the IT Slackers Society : Computer Humor Collection : BSD Logo Story : The Cuckoo's Egg : IT Slang : C++ Humor : ARE YOU A BBS ADDICT? : The Perl Purity Test : Object oriented programmers of all nations : Financial Humor : Financial Humor Bulletin, 2008 : Financial Humor Bulletin, 2010 : The Most Comprehensive Collection of Editor-related Humor : Programming Language Humor : Goldman Sachs related humor : Greenspan humor : C Humor : Scripting Humor : Real Programmers Humor : Web Humor : GPL-related Humor : OFM Humor : Politically Incorrect Humor : IDS Humor : "Linux Sucks" Humor : Russian Musical Humor : Best Russian Programmer Humor : Microsoft plans to buy Catholic Church : Richard Stallman Related Humor : Admin Humor : Perl-related Humor : Linus Torvalds Related humor : PseudoScience Related Humor : Networking Humor : Shell Humor : Financial Humor Bulletin, 2011 : Financial Humor Bulletin, 2012 : Financial Humor Bulletin, 2013 : Java Humor : Software Engineering Humor : Sun Solaris Related Humor : Education Humor : IBM Humor : Assembler-related Humor : VIM Humor : Computer Viruses Humor : Bright tomorrow is rescheduled to a day after tomorrow : Classic Computer Humor
The Last but not Least Technology is dominated by two types of people: those who understand what they do not manage and those who manage what they do not understand ~Archibald Putt. Ph.D
Copyright © 1996-2021 by Softpanorama Society. www.softpanorama.org was initially created as a service to the (now defunct) UN Sustainable Development Networking Programme (SDNP) without any remuneration. This document is an industrial compilation designed and created exclusively for educational use and is distributed under the Softpanorama Content License. Original materials copyright belong to respective owners. Quotes are made for educational purposes only in compliance with the fair use doctrine.
FAIR USE NOTICE This site contains copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available to advance understanding of computer science, IT technology, economic, scientific, and social issues. We believe this constitutes a 'fair use' of any such copyrighted material as provided by section 107 of the US Copyright Law according to which such material can be distributed without profit exclusively for research and educational purposes.
This is a Spartan WHYFF (We Help You For Free) site written by people for whom English is not a native language. Grammar and spelling errors should be expected. The site contain some broken links as it develops like a living tree...
|
|
You can use PayPal to to buy a cup of coffee for authors of this site |
Disclaimer:
The statements, views and opinions presented on this web page are those of the author (or referenced source) and are not endorsed by, nor do they necessarily reflect, the opinions of the Softpanorama society. We do not warrant the correctness of the information provided or its fitness for any purpose. The site uses AdSense so you need to be aware of Google privacy policy. You you do not want to be tracked by Google please disable Javascript for this site. This site is perfectly usable without Javascript.
Last modified: March 12, 2019
