Steps for diagnosing a hang or wait during IPL

Enter the IPCS IPLDATA STATUS command to determine how far along the system is in the IPL or nucleus initialization program (NIP) processing. There will be an entry for each initialization routine. The last entry indicates the last initialization routine to run. Use this module name in a search for a known problem. The following example indicates: IEAIPL99 ... Page frame table and cleanup as the last entry

Figure 1. IPL statistics example

*** IPL Statistics ***                                              
                                                                    
IEAIPL10  00:00:00.000  ISNIRIM - Read SCPINFO                      
IEAIPL20  00:00:01.688  Test Block storage to 2G                    
IEAIPL11  00:00:00.018  Fast FIND service                           
IEAIPL31  00:00:00.002  LOAD service                                
IEAIPL30  00:00:00.000  IPLWTO service                              
IEAIPL46  00:00:00.164  Read SCHIBs into IPL workspace              
IEAIPL49  00:00:00.000  Process Load and Default parameters         
IEAIPL50  00:00:00.774  IPL parmlib - process LOADxx and NUCLSTxx   
IEAIPL51  00:00:00.019  System architecture                         
IEAIPL43  00:00:00.032  Find and Open IODF data set                 
IEAIPL60  00:00:00.008  Read NCRs from IODF                         
IEAIPL70  00:00:00.208  UIM environment - load CBD and IOS services 
IEAIPL71  00:00:00.120  Build DFT for each device                   
IEAIPL08  00:00:00.007  Read EDT information from IODF              
IEAIPL40  00:00:00.093  Read MLTs from nucleus                      
IEAIPL42  00:00:00.018  Read NMLs from nucleus (IEANynnn modules)   
IEAIPL41  00:00:01.388  Read PDS directory entries and CESD records 
IEAIPL05  00:00:01.056  Build and sort NUCMAP                       
IEAIPL02  00:00:03.779  Load nucleus modules                        
IEAIPL04  00:00:00.020  Allocate PFT and SQA/ESQA                   
IEAIPL14  00:00:00.000  Build LSQA/ELSQA for Master                 
IEAIPL06  00:00:00.000  IARMI - RSM blocks, master SGT              
IEAIPL09  00:00:00.054  IAXMI - PFT, master RAB,  etc.              
IEAIPL07  00:00:00.037  Update AMODE for nucleus resident SVCs      
IEAIPL03  00:00:00.027  Build UCBs, ULUT, etc.                      
IEAIPL18  00:00:00.172  Copy and relocate EDT to ESQA               
IEAIPL99  00:00:00.465  Page frame table and cleanup                
                                                                    
Total IPL Time:  00:00:10.162

The following NIP example indicates IEAVNPFF ... Loadwait/Restart as the last entry.

                                                                    
*** NIP Statistics ***                                              
                                                                    
IEAVNIP0  00:00:00.024  NIP Base                                    
IEAVNIPM  00:00:00.077  Invoke NIP RIMs                             
IEAVNPE6  00:00:03.358  Service Processor Interface                 
IEAVNPFF  00:00:00.023  Loadwait/Restart

If the report is complete, with the last entries indicating master scheduler initialization is complete with total times as in the following example:

FINSHMSI  00:00:00.001  Wait for attached CMDs            
                                                          
IEEMB860  00:05:17.024      Uncaptured time:  00:00:00.810
                                                          
Total Time:  00:07:13.473

Enter the IPCS SELECT ALL command to verify which system address spaces are up and have completed initialization. For example:

ASID JOBNAME  ASCBADDR  SELECTION CRITERIA
---- -------- --------  ------------------
0001 *MASTER* 00FD3400  ALL               
0002 PCAUTH   00F8DE80  ALL               
0003 RASP     00F8DD00  ALL               
0004 TRACE    00F8DB80  ALL               
0005 DUMPSRV  00F8DA00  ALL               
0006 XCFAS    00F81E80  ALL               
0007 GRS      00F81D00  ALL               
0008 SMSPDSE  00F80400  ALL               
0009 CONSOLE  00F80280  ALL               
000A WLM      00F4F300  ALL               
000B ANTMAIN  00F4F180  ALL               
000C ANTAS000 00F4F000  ALL               
000D OMVS     00F4DE80  ALL               
000F IEFSCHAS 00FC6E80  ALL               
0010 JESXCF   00F8B500  ALL               
0011 ALLOCAS  00F8B380  ALL               
0012 IOSAS    00F97280  ALL               
0013 IXGLOGR  00F97100  ALL           
0014 JES2     00FC0D80  ALL

Do a search using symptoms including the last initialization routine to run, the last message issued to the log or screen, and the last address space to initialize.

Table 1. Common wait states that occur during IPL
Wait state code	Reason code	Explanation	Find information in:
X'064'	X'005'	Indicates an ABEND was issued during NIP. To diagnose using a SADUMP, enter the SYSTRACE ALL command, go to the bottom of the output and enter the *FIND SVC PREV** command to locate the the ABEND issued.	Diagnosing an abend
	EXAMPLE: WAITX'064' RSNX'005' 00 0001 00000000 *SVCE D 040C1000 814E1EE2 00000010 84000000 84878000 10000201 00000000 0001 0001 BEC5A7BA2DAC255B 00800004 00400000
	X'009'	Indicates a program check occurred during NIP. To diagnose using a SADUMP, format the LCCA by entering the CBFORMAT LCCAx command (where x is CP ID).
EXAMPLE: WAITX'064' RSNX'009' LCCA: 00F81000 +0000 LCCA..... LCCA CPUA..... 0041 CAFM..... 4000 PGR1..... 00000000 00000000 00000000 00000000 00000000 +001C 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 +0048 PGR2..... 00000000 08256D70 07BCBCF8 07DFC098 00FCC990 00000903 07BB6678 07E0717C 00000005 00000005 00000000 +0074 07EB2B5F 012B2AE0 08256F90 08256000 08257148 PPSW..... 070C1000 812B2B58 PINT..... 00040011 +0094 PVAD..... 08257000 CR0...... 00000000 PGR3..... 00000000 00000000 00000000 00000000 00000000 00000000 00000000 +00BC 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 P2A0..... 010D061C +00E4 P2A1..... 00000002 P2A2..... 00000000 P2A3..... 00000000 P2A4..... 00000000 P2A5..... 00000000 P2A6..... 00000000 +00FC P2A7..... 00000000 P2A8..... 00000000 P2A9..... 00000000 P2AA..... 00000000 P2AB..... 00000000 P2AC..... 00000000 +0114 P2AD..... 00000000 P2AE..... 00000000 P2AF..... 7F281180 +0120 RSGR..... 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 +014C 00000000 00000000 00000000 00000000 00000000 DSA2..... 00000000 P2C0..... 5FB1EE40 P2C1..... 0331B07F +016C P2C2..... 037B9E00 PX2K..... 8040 PX2S..... 000A PX2A..... 0001 PX2P..... 000A P2C5..... 04EC6280 +017C P2C6..... FE000000 P2C7..... 0331B07F P2C8..... 00000000 P2C9..... 00000000 P2CA..... 00000000 P2CB..... 00000000 +0194 P2CC..... 02FCA403 P2CD..... 0331B07F P2CE..... DF884EC5 P2CF..... 7F70A0B8 PSW3..... 00000000 00000000
X'040'	Not applicable	Indicates an ABEND was issued during NIP. Gather additional information by entering the IPCS STATUS CPU:	From this example, a search argument including symptoms WAIT040 ABEND878 RC10 IEAVNPB2 would be built to check for a known problem.
X'040'	Example: CPU (X'00') STATUS: PSW=00020000 80000000 00000000 00878040 (Running in PRIMARY, key 0, AMODE 31, DAT OFF) Disabled for PER I/O MCH NIP RIM IEAVNPB2 has failed ABEND=878 REASON=00000010 Register values 0-3 84000000 84878000 03A5EF90 0000E676 4-7 00FCC498 00FCDC98 0393F428 00FCC000 8-11 0187C518 00001000 00000000 00000030 12-15 00000001 00000000 FE000424 00000010 ASCB1 at FCC000, JOB(MASTER), for the home ASID ASXB1 at FCC370 and a local SRB for the home ASID HOME ASID: 0001 PRIMARY ASID: 0001 SECONDARY ASID: 0001