AIX 5L Problem Determination - IBM Redbooks

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Figure 3-3 Task selection menu in diag Finally, you have to choose whether to change the Normal mode bootlist or the Service mode bootlist, as shown in Figure 3-4. Figure 3-4 Display/alter bootlist menu in diag 18 IBM ^ Certification Study Guide - AIX 5L Problem Determination Tools and Techniques
At this point, a lot of things can cause a boot problem. The bootlist could point to a device that does not have a BLV, or the devices pointed to are not accessible because of hardware errors. The following sections cover several problems that can cause a halt. All problems at this stage of the startup process have an error code defined, which is shown on the LED display on the operator panel of the system. These LED values are covered again in 4.3.5, “Common boot time LEDs” on page 57, with the additional codes not related to initial system startup. LED 200 A LED code 200 is related to the secure key position. When the key is in the secure position, the boot will stop until the key is turned, either to the normal position or the service position. The boot will then continue. LED 299 A LED code of 299 indicates that the BLV will be loaded. If this LED code is passed, then the load is successful. If, after passing 299, you get a stable 201, then you have to recreate the BLV, as discussed in “How to recreate the BLV” on page 19. MCA LED codes Table 3-1 provides a list of the most common LED codes on MCA systems. More of these can be found in the AIX base documentation. Table 3-1 Common MCA LED codes LED Description 100–195 Hardware problem during BIST. 200 Key mode switch in secure position. 201 If LED 299 passed, recreate BLV. If LED 299 has not passed, POST encountered a hardware error. 221 721 221–229 223–229 225–229 233–235 The bootlist in NVRAM is incorrect (boot from media and change the bootlist), or the bootlist device has no bootimage (boot from media and recreate the BLV), or the bootlist device is unavailable (check for hardware errors). How to recreate the BLV When the LED code indicates that the BLV cannot be loaded, you should start diagnosis by checking for hardware problems, such as cable connections. The Chapter 3. Booting problem determination 19
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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
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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
Page 54 and 55: 3.5.2 LED 553 3.5.3 LED c31 3.5.4 L
Page 56 and 57: 3.5.5 pSeries servers A specific LE
Page 58 and 59: When the system is gracefully shut
Page 60 and 61: LED Reason/action c31 Define the co
Page 62 and 63: 3. A file system is being mounted b
Page 64 and 65: 3.9.1 Answers 3.10 Exercises The fo
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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
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Page 86 and 87: 4.5.1 Answers 4.6 Exercises The fol
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5.2 Starting a system dump A user-i
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A command status screen will be dis
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If the system does not have a key s
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The shconf command is invoked when
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5.4 Increasing the size of the dump
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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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