AIX 5L Problem Determination - IBM Redbooks

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4.1 Hardware basics RS/6000 and pSeries servers are available in a variety of models. A server can be in single processor or multiprocessor configurations. Currently, models comply to a number of architecture specifications, such as Micro Channel, PowerPC Reference Platform (PREP), Common Hardware Reference Platform (CHRP), and RS/6000 Platform Architecture (RPA). The hardware platform type is an abstraction that allows machines to be grouped according to fundamental configuration characteristics, such as the number of processors or I/O bus structure. Machines with different hardware platform types have basic differences in the way their devices are dynamically configured at boot time. Currently available hardware platforms, which are able to be differentiated by software, in the RS/6000 and pSeries family are: rs6k Micro Channel-based uni-processor models rs6ksmp Micro Channel-based symmetric multiprocessor models rspc ISA-bus models chrp PCI-bus models In order to determine the hardware platform type on your machine, enter the following command: # bootinfo -p chrp 4.1.1 Hardware inventory To determine a system’s hardware inventory, use either the lsdev command or the lscfg command. These commands show different aspects of installed devices. The lsdev command displays information about devices in the device configuration database. # lsdev -C sys0 Available 00-00 System Object sysplanar0 Available 00-00 System Planar pci0 Available 00-fef00000 PCI Bus pci1 Available 00-fee00000 PCI Bus pci2 Available 00-fed00000 PCI Bus isa0 Available 10-58 ISA Bus sa0 Available 01-S1 Standard I/O Serial Port sa1 Available 01-S2 Standard I/O Serial Port scsi1 Available 30-58 Wide SCSI I/O Controller cd0 Available 10-60-00-4,0 SCSI Multimedia CD-ROM Drive mem0 Available 00-00 Memory proc0 Available 00-00 Processor 44 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques
proc1 Available 00-01 Processor proc2 Available 00-02 Processor proc3 Available 00-03 Processor L2cache0 Available 00-00 L2 Cache sioka0 Available 01-K1-00 Keyboard Adapter fd0 Available 01-D1-00-00 Diskette Drive rootvg Defined Volume group hd5 Defined Logical volume tok0 Available 10-68 IBM PCI Tokenring Adapter (14103e00) ent0 Available 10-80 IBM PCI Ethernet Adapter (22100020) ent1 Available The output shows whether the device is in the Available or Defined state. Use the lscfg command to display vital product data (VPD) such as part numbers, serial numbers, microcode level, and engineering change levels from either the Customized VPD object class or platform-specific areas. To display all of these features for hdisk1, enter: # lscfg -vp -l hdisk1 DEVICE LOCATION DESCRIPTION hdisk1 10-60-00-9,0 16 Bit SCSI Disk Drive (9100 MB) Manufacturer................IBM Machine Type and Model......DNES-309170W FRU Number..................25L3101 ROS Level and ID............53414730 Serial Number...............AJ286572 EC Level....................F42017 Part Number.................25L1861 Device Specific.(Z0)........000003029F00013A Device Specific.(Z1)........25L2871 Device Specific.(Z2)........0933 Device Specific.(Z3)........00038 Device Specific.(Z4)........0001 Device Specific.(Z5)........22 Device Specific.(Z6)........F42036 PLATFORM SPECIFIC Name: sd Node: sd Device Type: block Chapter 4. Hardware problem determination 45
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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
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
Page 42 and 43: 3.2.2 PCI systems next step is to s
Page 44 and 45: 3.3 Boot phase 1 Newer PCI architec
Page 46 and 47: 3.4 Boot phase 2 In boot phase 2, t
Page 48 and 49: As mentioned, there are a lot of di
Page 50 and 51: 3.4.3 LED 518 product documentation
Page 52 and 53: Figure 3-9 Boot phase 3 /etc/initta
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Page 58 and 59: When the system is gracefully shut
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Page 64 and 65: 3.9.1 Answers 3.10 Exercises The fo
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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
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
Page 94 and 95: If the system does not have a key s
Page 96 and 97: The shconf command is invoked when
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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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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