AIX 5L Problem Determination - IBM Redbooks

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Flag Description -t Format Lists each string preceded by its offset from the start of the file. The format is dependent on the character used as the format variable: 5.9.5 The sysdumpdev command d writes the offset in decimal. o writes the offset in octal. x writes the offset in hexadecimal. When the -o and the -t Format flags are defined more than once on a command line, the last flag specified controls the behavior of the strings command. -Number Specifies a minimum string length other than the default of four characters. The maximum value of a string length is 4096. This flag is identical to the -n Number flag. File Binary or object file to be searched. The sysdumpdev command changes the primary or secondary dump device designation in a system that is running. The primary and secondary dump devices are designated in a system configuration object. The new device designations are in effect until the sysdumpdev command is run again, or the system is restarted. If no flags are used with the sysdumpdev command, the dump devices defined in the SWservAt ODM object class are used. The default primary dump device is /dev/hd6. The default secondary dump device is /dev/sysdumpnull. Note: Do not use a mirrored or copied logical volume as the active primary dump device. System dump error messages will not be displayed, and any subsequent dumps to a mirrored logical volume will fail. Do not use a diskette drive as your dump device. If you use a paging device, only use hd6, the primary paging device. AIX Version 4.2.1 or later supports using any paging device in the root volume group (rootvg) as the secondary dump device. The sysdumpdev command syntax is as follows: sysdumpdev [-c | -C] -P { -p Device | -s Device } [ -q ] sysdumpdev [-c | -C] [ -p Device | -s Device] [ -q ] sysdumpdev [-c | -C] [ -d Directory | -D Directory | -e | [ -k | -K ] | -l | -L | -p Device | -q | -r Host: Path | -s Device | -z ] 98 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques
Commonly used sysdumpdev command flags are listed in Table 5-7. Table 5-7 Commonly used flags of the sysdumpdev command Flag Description -c Specifies that dumps will not be compressed. The -c flag applies to only AIX Version 4.3.2 and later versions. -C Specifies that all future dumps will be compressed before they are written to the dump device. The -C flag applies to only AIX Version 4.3.2 and later versions. -d Directory Specifies the directory the dump is copied to at system boot. If the copy fails at boot time, the -d flag ignores the system dump. -D Directory Specifies the directory the dump is copied to at system boot. If the copy fails at boot time, using the -D flag allows you to copy the dump to an external media. When using the -d Directory or -D Directory flags, the following error conditions are detected: Directory does not exist. Directory is not in the local journaled file system. Directory is not in the rootvg volume group. -e Estimates the size of the dump (in bytes) for the current running system. -k Requires the key mode switch to be in the service position before a dump can be forced with the Reset button or the dump key sequences. This is the default setting. -K The Reset button or the dump key sequences will force a dump with the key in the normal position. On a machine without a key mode switch, a dump cannot be forced with the Reset button or the key switch without this value set. -l Lists the current value of the primary and secondary dump devices, copy directory, and forcecopy attribute. -L Displays statistical information about the most recent system dump. This includes date and time of last dump, number of bytes written, and completion status. The status value will correspond to the dump LED codes as follows: 0 = 0c0 - Dump completed successfully -1 = 0c8 - No primary dump device -2 = 0c4 - Partial dump -3 = 0c5 - Dump failed to start -P Makes permanent the dump device specified by the -p or -s flags. The -P flag can only be used with the -p or -s flags. Chapter 5. System dumps 99
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ibm.com/redbooks IBM Certification
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Note: Before using this information
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3.5.1 The /etc/inittab file . . . .
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7.2.1 Data relocation . . . . . . .
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9.9.1 The lslicense command . . . .
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x IBM ^ Certification Study Guide -
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10-12 Performance tuning flowchart
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8-7 Commonly used flags of the rout
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Trademarks The following terms are
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This publication does not replace p
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Comments welcome Your comments are
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1.1 Certification requirements To a
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e. Verify that file systems are mou
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Preparation for this exam is the to
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2.1 Defining the problem The first
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If the problem occurs on more than
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2.4.1 Answers The following are the
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3.1 A general overview of the boot
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mainly to components on the motherb
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Figure 3-3 Task selection menu in d
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3.2.2 PCI systems next step is to s
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3.3 Boot phase 1 Newer PCI architec
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3.4 Boot phase 2 In boot phase 2, t
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As mentioned, there are a lot of di
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3.4.3 LED 518 product documentation
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Figure 3-9 Boot phase 3 /etc/initta
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3.5.2 LED 553 3.5.3 LED c31 3.5.4 L
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3.5.5 pSeries servers A specific LE
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When the system is gracefully shut
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LED Reason/action c31 Define the co
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3. A file system is being mounted b
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3.9.1 Answers 3.10 Exercises The fo
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4.1 Hardware basics RS/6000 and pSe
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The most important fields in the pr
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Page 72 and 73: ► Full testing requires that the
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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
Page 88 and 89: 5.1 Configuring the dump device Pri
Page 90 and 91: 5.2 Starting a system dump A user-i
Page 92 and 93: A command status screen will be dis
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Page 98 and 99: 5.4 Increasing the size of the dump
Page 100 and 101: Setting output device to /dev/rmt0.
Page 102 and 103: Look at the time of the dump and th
Page 104 and 105: Failure Causes SOFTWARE PROGRAM Rec
Page 106 and 107: Using crash, you can examine: ► A
Page 108 and 109: ► ? or help[] Lists all subcomman
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Page 112 and 113: DSIRR Data Storage Interrupt Reason
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Page 116 and 117: In this example, the VMM return cod
Page 118 and 119: The snap command syntax is as follo
Page 122 and 123: Flag Description -p Device Temporar
Page 124 and 125: Figure 5-3 Error log case study 2.
Page 126 and 127: Figure 5-4 Case study Which of the
Page 128 and 129: 5.10.1 Answers 5.11 Exercises The f
Page 130 and 131: 6.1 The error daemon The error logg
Page 132 and 133: To change the current log file, the
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Page 136 and 137: Flag Description -g Displays the AS
Page 138 and 139: Flag Description -F FlagList Select
Page 140 and 141: Probable Causes ERRDEMON STARTED AU
Page 142 and 143: To display a detailed report of all
Page 144 and 145: USER ID 0 0=SOFT IPL 1=HALT 2=TIME
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Page 148 and 149: Flag Description -k ErrorID[,ErrorI
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Page 160 and 161: 7.1 LVM data The Logical Volume Man
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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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7.7.1 Answers 7.8 Exercises The fol
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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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8.6.1 Answers 8.7 Exercises The fol
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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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