IBM Certification Study Guide AIX Problem Determination Tools and Techniques 2nd Edition by Ibm Redbooks ISBN 0738418331 978-0738418339
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ISBN 10: 0738418331
ISBN 13: 978-0738418339
Author: Ibm Redbooks
Here’s a detailed overview / summary of IBM Certification Study Guide – AIX 5L Problem Determination Tools and Techniques (2nd Edition, IBM Redbooks), along with what it covers, how it can help, and some suggestions if you plan to use it. If you want, I can also help you get access to the PDF or print copy.
Table of contents:
Chapter 1. Problem determination introduction.
1.1 Problem determination process
1.1.1 Defining the problem
1.1.2 Gathering information from the user.
1.1.3 Gathering information from the system.
1.1.4 Resolving the problem
1.1.5 Obtaining software fixes and hardware microcode updates
1.1.6 Other relevant documentation.
1.2 Troubleshooting starting point
1.2.1 Boot path flowchart.
1.2.2 Symptom index
1.3 Avoiding problems
1.3.1 System health check.
Chapter 2. Error logging
2.1 Error logging overview
2.2 Error log file processing
2.2.1 Error templates
2.2.2 Error messages.
2.3 Error log management
2.3.1 Viewing the error log
2.3.2 Reading a summary error log
2.3.3 Reading error logs in detail
2.3.4 Examples of detailed error reports
2.4 Finding a core dump.
Chapter 3. Boot problems.
3.1 Types of machines.
3.2 The boot process
3.2.1 Pre-boot state
3.2.2 Boot stage one
3.2.3 Boot stage two
3.2.4 Boot stage three
3.3 Boot problem determination
3.3.1 Failure to locate a boot image..
3.3.2 Codes displayed longer than five minutes
3.3.3 LED code 269 on SMP machines.
3.3.4 LED 549 hang.
3.4 Minimum configuration.
3.5 Accessing rootvg from bootable media.
3.6 LED 551, 552, 554, 555, 556, and 557 halts.
3.6.1 LED 551, 555, or 557 halt.
3.6.2 LED 552, 554, or 556 halt.
3.6.3 LED 553 stop.
3.7 No login prompt.
Chapter 4. System dumps
4.1 Introduction
4.2 Saving a system dump when system is booting
4.2.1 LED 549
4.3 Preparing for the dump.
4.3.1 Estimate the size of the dump.
4.3.2 Selecting the dump device
4.3.3 Create a dump device..
4.3.4 The dumpcheck command
4.3.5 Change the size of a dump device
4.3.6 Optional setup…
4.4 Checking the dump status
4.4.1 Get the last dump information.
4.4.2 Dump status codes.
4.4.3 The sysdumpdev command
4.4.4 Verifying the dump
4.5 Collecting the dump and related information.
4.5.1 The snap command
4.6 Initiating a system dump.
4.6.1 LED reason codes.
4.6.2 How to force a dump.
4.7 The kdb command
4.7.1 Uses of kdb.
4.7.2 What is the kernel?
4.7.3 Examining a system dump with the kdb command.
4.7.4 Basic kdb subcommands
4.7.5 Examining a system dump with the crash command
4.7.6 Types of crashes.
4.7.7 Data required by IBM support.
Chapter 5. Hardware problem determination
5.1 General advice.
5.1.1 Diagnostic tips….
5.1.2 Device location notation
5.2 Problem diagnosis
5.2.1 Making sense of the error log
5.2.2 Physical inspection
5.3 Running diagnostics
.
5.3.1 Concurrent mode
5.3.2 Online diagnostics in service mode.
5.3.3 Stand-alone diagnostics
5.3.4 Stand-alone diagnostics from NIM server
5.3.5 Task selection or service aids.
5.4 System Management Services (SMS)
5.4.1 Firmware-based SMS
5.4.2 Diskette-based SMS
5.4.3 Using SMS on 7020 and 7248
5.5 TTY setup for use as a console
5.6 Checkstops and machine checks
5.6.1 How to use the data
5.7 Diagnosis of SCSI problems.
5.7.1 Basic SCSI checks
5.8 Serial Storage Architecture (SSA) disks
5.8.1 General SSA setup rules.
5.8.2 SSA devices.
5.8.3 SSA disk does not configure as a hdisk
5.9 Peripheral devices
5.9.1 Disk drawers or towers.
5.9.2 External tapes and tape libraries.
5.9.3 General tape troubleshooting
5.9.4 4 mm, 8 mm, and DLT tape drives
5.9.5 QIC tape drives.
5.9.6 CD-ROM jukeboxes
Chapter 6. LVM and JFS
6.1 Logical Volume Manager (LVM)
6.1.1 High-level commands
6.1.2 Intermediate commands
6.1.3 Library calls.
6.1.4 LVM device driver.
6.1.5 Disk device driver
6.1.6 SCSI device driver
6.2 LVM system data
6.2.1 LVM data on disk control blocks
6.2.2 LVM data in the operating system.
6.2.3 Physical volumes
6.2.4 Volume groups
6.2.5 Logical volumes
6.2.6 Object Data Manager (ODM)
6.3 LVM problem determination
6.3.1 Data integrity.
6.3.2 Re-synchronizing the ODM.
6.3.3 Collecting data
6.3.4 Problems with importvg
6.4 JFS problems.
6.4.1 Mounting file systems
6.4.2 File system recovery
6.4.3 JFS log problems
6.4.4 Enhanced Journaled File System (JFS2)
6.5 Disk replacement management
6.5.1 Disk replacement procedure.
Chapter 7. TCP/IP and networking problem solving
7.1 General network problem isolation.
7.2 Problem isolation steps for TCP/IP network problems
7.2.1 Selective host network problems
7.2.2 No network access
7.2.3 Name resolution problems
7.2.4 Routing problem debugging
7.2.5 Dynamic or static routing.
7.2.6 SRC problems.
7.2.7 Network interface problems
7.3 Common TCP/IP problems.
7.3.1 Problems with packet delivery using a bridge.
7.3.2 LED 581 hang.
7.3.3 Telnet or rlogin problems
7.3.4 Dynamic Host Configuration Protocol (DHCP) problems
7.3.5 snmpd not responding to queries
7.3.6 X.25 function keys not working properly
7.4 TCP/IP network configuration issues
7.4.1 Maximum Transmission Unit (MTU)..
7.4.2 Path MTU (PMTU) and multipath routing
7.4.3 mbufs
7.4.4 thewall.
7.4.5 TCP/IP problem isolation commands
7.4.6 ping.
7.4.7 rup..
7.4.8 traceroute
7.4.9 netstat
7.4.10 arp..
7.4.11 iptrace and ipreport.
7.4.12 tcpdump
7.4.13 no
7.4.14 The stat commands.
7.4.15 Virtual IP addresses
7.5 NIS and NIS+ troubleshooting
7.5.1 Troubleshooting tools for NIS
7.5.2 Troubleshooting examples with NIS
7.5.3 Troubleshooting examples for NIS+
7.5.4 Automountd debugging..
7.6 NFS troubleshooting..
7.6.1 Identifying hard-mounted and soft-mounted file problems
7.6.2 Identifying NFS problems checklist.
7.6.3 Asynchronous write errors
7.6.4 Common NFS error messages
7.6.5 Identifying the cause of slow access times for NFS
7.6.6 Checking network connections
7.6.7 Setting MTU sizes..
7.6.8 Fixing hung programs..
7.6.9 Permissions and authentication schemes.
7.6.10 Name resolution on an NFS server.
7.6.11 Mounting from NFS servers that have an earlier version of NFS
7.6.12 Problems that occur if the NFS kernel extension is not loaded..
7.7 Problems with a SLIP network interface
7.8 Asynchronous Point-to-Point Protocol (PPP) debugging.
7.8.1 AIX as a PPP client (outgoing calls)
7.8.2 AIX as a PPP server (incoming calls).
7.8.3 PPP and snmp
7.8.4 Enabling PPP SNMP.
7.9 Sendmail troubleshooting.
7.9.1 Local mail delivery.
7.9.2 Network mail delivery
Chapter 8. X11 and graphics
8.1 Handling graphics devices.
8.1.1 Removing devices.
8.1.2 Hot plugging
8.2 X11 component isolation
8.3 X server.
8.3.1 Start X server
8.3.2 Failure to start.
8.3.3 Hung or stopped server.
8.4 Connecting X clients to the X server.
8.4.1 The DISPLAY variable
8.4.2 X transport.
8.4.3 Testing client/server connectivity
8.4.4 Failed X client start
8.5 X kernel extension
8.5.1 Loading an X extension.
8.5.2 Installing verification commands.
8.5.3 Checking X extensions.
8.6 CDE problem determination
8.6.1 CDE log files
8.6.2 Login screen does not appear.
8.6.3 Problem with login…
8.6.4 CDE hangs.
8.6.5 The DT messaging system could not be started.
8.7 Client libraries
8.7.1 X11R6.
8.7.2 X11R6 enhancements.
8.7.3 X11/Motif compatibility fileset
Chapter 9. User applications troubleshooting
9.1 Problem determination approach
9.2 Application startup problems
9.2.1 PATH problems.
9.2.2 Permissions problems.
9.2.3 Name conflict
9.2.4 Library problems.
9.2.5 Licensing and environment problems
9.2.6 Binary compatibility and Linux application affinity
9.3 Application resource monitoring
9.3.1 Resource problems.
9.3.2 Resource Monitoring Control
9.4 System hang detection..
9.4.1 Option 1: Using SMIT
9.4.2 Option 2: Using the command line interface.
Chapter 10. Performance problems
10.1 Performance bottlenecks
10.2 Monitoring performance
10.2.1 Monitoring CPU.
10.2.2 Monitoring memory
10.2.3 Monitoring I/O.
10.3 Monitoring network performance
10.3.1 Using the netpmon command.
10.4 The topas monitor
10.5 Workload management.
10.6 Reporting performance problems to IBM
10.7 Other tools
Chapter 11. Event tracing.
11.1 Introduction
11.2 Installing trace
11.3 Taking a trace
11.3.1 Hook IDs..
11.3.2 Selecting trace events.
11.3.3 Timing the trace
11.3.4 Starting a trace
11.3.5 Collecting trace data for analysis
11.3.6 Tracing fatal problems.
11.4 Generating a trace report.
11.4.1 Running trcrpt command.
11.4.2 Filtering the trace report
11.4.3 Running trace report on a different system.
11.4.4 Analysis of trace report.
Chapter 12. Printing problems.
12.1 Common troubleshooting checklist.
12.1.1 Checklist for local printing problems
12.1.2 Checklist for remote printing problems
12.1.3 Check the obvious.
12.1.4 Nothing prints on local printers
12.1.5 The output is garbled or incomplete
12.1.6 The output spacing is bad.
12.1.7 The output prints with the wrong font
12.1.8 The print job requests the wrong paper size.
12.1.9 Network print jobs fail to print
12.2 Common troubleshooting techniques
12.2.1 Using Iptest to generate print files..
12.2.2 Use enscript to generate PostScript.
12.2.3 Use splp to look at printer devices
12.2.4 Printing to a file.
12.2.5 Printing directly to the device special file
12.2.6 Printing directly to network printers.
12.2.7 Using iptrace to trace network printing
12.2.8 Capturing files..
12.2.9 Capture the flag.
12.2.10 Using the script shell to capture user input.
12.2.11 Using fuser to find processes
12.2.12 Using the echo statement in shell scripts
12.2.13 Special considerations for some RS/232 adapters.
12.3 Troubleshooting for System V printing
12.3.1 File permission problems
12.3.2 Is the print service active?.
12.3.3 Does the printer have the right attributes?
12.3.4 Logs and status files.
12.3.5 Is the LANG variable set right?.
12.3.6 Cancelled remote jobs still queued.
12.3.7 Printing to a file.
12.3.8 Cleaning up and starting over.
12.3.9 Stopping unwanted header pages
12.3.10 Troubleshooting System V interface scripts
12.3.11 Check timeouts in the Systems file for remote queues
12.3.12 Is/etc/lp/Systems file entry correct?.
12.3.13 Example: solving a remote printing problem.
12.3.14 Troubleshooting HP JetDirect printing
12.4 Troubleshooting for PowerPC printing
12.4.1 File permission problems
12.4.2 Is the print service active?.
12.4.3 Does the printer have the right attributes?
12.4.4 Logs and status files.
12.4.5 Printing to a file with PowerPC printing.
12.4.6 Cleaning up and starting over.
12.4.7 Checking the flags to enq
12.4.8 Stopping unwanted header pages
12.5 Common errors and solutions.
12.5.1 Problem adding a second local printer on the same device…
12.5.2 Cannot change attributes because device is busy
12.5.3 Remote job disappears after queue enabled
12.5.4 Bad mandatory environment variable
12.5.5 LOG: is read only
12.5.6 No formfeed after banner page.
Chapter 13. NIM troubleshooting.
13.1 Debugging a network boot problem
13.1.1 Establishing network communication between client and server
13.1.2 Obtaining the boot image from the server.
13.1.3 Running the boot image on the client.
13.2 Producing debug output for NIM BOS installations
13.2.1 Producing debug output from a network boot image
13.2.2 Producing debug output from the BOS install program.
13.2.3 To produce debug output without using a bosinst_data resource.
13.2.4 To produce debug output when using a bosinst_data resource
13.3 Viewing NIM logs
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