AIX 5L Problem Determination - IBM Redbooks

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3.4.3 LED 518 product documentation for the AIX release you are using to make sure all of the parameters shown are correct): # dd count=1 bs=4k skip=31 seek=1 if=/dev/hd4 of=/dev/hd4 The 518 LED code has an unclear definition in the product documentation, which reads: Display Value 518 Remote mount of the / (root) and /usr file systems during network boot did not complete successfully. This is not the entire problem. If the system runs into problems while mounting the /usr from disk (locally, not a network mount), you will get the same error. Fix this problem using the same procedure as you would for any other rootvg file system corruption. 3.4.4 The alog command Up until this stage, the system has not yet configured the console, so there is no stdout defined for the boot processes. At this stage, the alog command is useful. The alog command can maintain and manage logs. All boot information is sent through the alog command. To look at the boot messages, use the following command options: # alog -ot boot ****************** no stderr *********** ---------------- Time: 12 LEDS: 0x538 invoking top level program -- "/usr/lib/methods/definet > /dev/null 2>&1;opt=`/u sr/sbin/lsattr -E -l inet0 -a bootup_option -F value` if [ $opt = "no" ];then nf=/etc/rc.net else nf=/etc/rc.bsdnet fi;$nf -2;x=$?;test $x -ne 0&&echo $nf failed. Check for invalid command s >&2;exit $x" Time: 21 LEDS: 0x539 return code = 0 ****************** no stdout *********** The alog command with the -C option hangs the attributes for a specified log type. 28 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques
3.5 Boot phase 3 Assuming that you have a existing log type sample in the alog configuration database, to change the name of the log file for the log type sample to /var/sample.log, enter: # alog -C -t sample -f /var/sample.log The next step of the boot process checks the bootup_option to determine if a BSD-style configuration of TCP/IP services are to be used, or if the default of ODM-supported configuration should be used. During this stage, the LED codes 538 and 539 are shown, as provided in the preceding alog example. In the boot process, the following boot tasks have been accomplished: ► Hardware configuration performed during BIST and POST ► The load of the BLV ► Phase 1, where base devices are configured to prepare the system for activating the rootvg ► Phase 2, where rootvg is activated Finally, phase 3 is initiated by the init process loaded from rootvg. An outline of this phase is shown in Figure 3-9 on page 30. Chapter 3. Booting problem determination 29
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Page 4 and 5: Note: Before using this information
Page 6 and 7: 3.5.1 The /etc/inittab file . . . .
Page 8 and 9: 7.2.1 Data relocation . . . . . . .
Page 10 and 11: 9.9.1 The lslicense command . . . .
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Page 14 and 15: 10-12 Performance tuning flowchart
Page 16 and 17: 8-7 Commonly used flags of the rout
Page 18 and 19: Trademarks The following terms are
Page 20 and 21: This publication does not replace p
Page 22 and 23: Comments welcome Your comments are
Page 24 and 25: 1.1 Certification requirements To a
Page 26 and 27: e. Verify that file systems are mou
Page 28 and 29: Preparation for this exam is the to
Page 30 and 31: 2.1 Defining the problem The first
Page 32 and 33: If the problem occurs on more than
Page 34 and 35: 2.4.1 Answers The following are the
Page 36 and 37: 3.1 A general overview of the boot
Page 38 and 39: mainly to components on the motherb
Page 40 and 41: Figure 3-3 Task selection menu in d
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Page 48 and 49: As mentioned, there are a lot of di
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Page 58 and 59: When the system is gracefully shut
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Page 68 and 69: The most important fields in the pr
Page 70 and 71: Figure 4-1 Main diagnostics menu Th
Page 72 and 73: ► Full testing requires that the
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Page 76 and 77: Note: This service aid is only pres
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Page 80 and 81: LED 299 A LED code of 299 shows tha
Page 82 and 83: Figure 4-2 Format of the 103 code m
Page 84 and 85: 4.5 Quiz The following assessment q
Page 86 and 87: 4.5.1 Answers 4.6 Exercises The fol
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Page 90 and 91: 5.2 Starting a system dump A user-i
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Page 96 and 97: The shconf command is invoked when
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Setting output device to /dev/rmt0.
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Look at the time of the dump and th
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Failure Causes SOFTWARE PROGRAM Rec
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Using crash, you can examine: ► A
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► ? or help[] Lists all subcomman
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LR: .waitproc+d4 (0000edc4) 2ff3b38
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DSIRR Data Storage Interrupt Reason
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*prevthread:0xe6000000 *nextthread:
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In this example, the VMM return cod
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The snap command syntax is as follo
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Flag Description -t Format Lists ea
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Flag Description -p Device Temporar
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Figure 5-3 Error log case study 2.
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Figure 5-4 Case study Which of the
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5.10.1 Answers 5.11 Exercises The f
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6.1 The error daemon The error logg
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To change the current log file, the
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To process a report from the error
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Flag Description -g Displays the AS
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Flag Description -F FlagList Select
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Probable Causes ERRDEMON STARTED AU
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To display a detailed report of all
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USER ID 0 0=SOFT IPL 1=HALT 2=TIME
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Resource Class: planar Resource Typ
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Flag Description -k ErrorID[,ErrorI
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6.5.1 Setting up an accounting syst
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6.6 The syslogd daemon The syslogd
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Use the following message priority
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3. A system operator accidentally d
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6.7.1 Answers 6.8 Exercises The fol
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7.1 LVM data The Logical Volume Man
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7.2.1 Data relocation 7.2.2 Backup
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AIX version level Verify that the v
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This example shows that the volume
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This error information displays the
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hdisk0 Available 30-58-00-8,0 16 Bi
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7.4 The AIX JFS 7.4.1 Creating a JF
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7.4.2 Increasing the file system si
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In many cases, restoration of the b
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lv02 jfs 2 2 1 open/syncd /u/testfs
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► Understanding enhanced journale
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512 bytes) to minimize internal fra
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Function JFS2 JFS Compression No Ye
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7.4.10 Disk quota Pseudo file name
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home: blocks in use: 0, limits (sof
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7.5.3 Reducing and removing paging
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Table 7-3 Commonly used flag of the
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7.6.4 The rmlvcopy command The rmlv
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Which of the following commands sho
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8.1 Network interface problems If h
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As you can see, the output shows th
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3. If there is a default route, att
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If you are using the route command
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address of the named server and try
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TOK: access control field = 0, fram
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4. Initiate an iptrace (client, ser
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the nfs_max_threads parameter of th
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Flags Description -s host Records p
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8.6 Quiz Table 8-8 Commonly used fl
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8. Which of the following options w
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9.1 User license problems If it is
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telnet: connect: A remote host did
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9.2.4 Telnet error If when attempti
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user is limited and defined as an A
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9.4.3 A full file system uid=0(root
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9.5.1 Trace hook IDs The events tra
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your trace, the system may be traci
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113 0.004261661 0.001518 unlock: lo
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If the sendmail command encounters
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9.8 Printing Task SMIT fast path Co
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Action or function System V PowerPC
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Switching between subsystems The op
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Flag Description -s Subsystem Speci
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9.10 Quiz Flag Description -O Optio
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6. A user has the ability to ping t
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232 IBM ^ Certification Study Guide
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Figure 10-1 General performance tun
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Display previously captured data Th
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10.1.2 The vmstat command The vmsta
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later). The method used in AIX Vers
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second. Large values indicate a CPU
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kernel routine records the process
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syncd 1 2 2 0 0 0 sh 1 1 1 0 0 0 sl
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The memory columns The memory colum
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The sr column The sr column shows t
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If you want to sort to the sixth co
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► Workload Management Class (-W)
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schedtune limitations The schedtune
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schedtune parameters are reset by t
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Normal files are automatically mapp
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tty: tin tout avg-cpu: % user % sys
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When looking for performance proble
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those that do not. If you are runni
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The netstat -m command The netstat
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spec buf 1 0 0 0 128 128 0 locking
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Late Collision Errors The Late Coll
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The retrans column displays the num
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Figure 10-3 Web-based System Manage
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Superclasses A superclass is a clas
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► Shared subclass: This subclass
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The sequence of attributes within a
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This manual assignment can be done
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This defines three levels of privil
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The class assignment is done by WLM
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Figure 10-8 shows the SMIT panel wh
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Figure 10-10 SMIT panel for rset re
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10.6.1 The dbx command The dbx comm
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Subcommand Description return Conti
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15) phxent_dd [5 entries] 16) kbddd
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10.8 Command summary The following
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10.8.4 The nfsstat command 10.9 Qui
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6. Which command will show system c
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11.1 Overview 11.1.1 Terminology 11
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Note: Before installing a new set o
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► APAR number, such as IY00301. I
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► To install all filesets associa
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Table 11-2 Commonly used flags of t
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11.5 Quiz Flag Description -f Check
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- A Web server The browser must be
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Figure 12-2 HTTP filesets If you ar
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- Remote computer Type the remote d
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Figure 12-4 Documentation Library S
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CISPR International Special Committ
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I/O Input/Output I 2 C Inter Integr
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OEM Original Equipment Manufacturer
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SPM System Performance Measurement
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Other resources These publications
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phase1 figure 23 phase2 15, 24, 36
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pc.statd 189 daemons shdaemon 73 te
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host name resolution telnet login p
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N name resolution diagnostic 185 pr
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ecent CPU usage 241 recovering an i
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System Resource Controller (SRC) 13
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IBM Certification Study Guide - AIX
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AIX 5L Problem Determination - IBM Redbooks

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