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Conference spezko::cluster

Title:+ OpenVMS Clusters - The best clusters in the world! +
Notice:This conference is COMPANY CONFIDENTIAL. See #1.3
Moderator:PROXY::MOORE
Created:Fri Aug 26 1988
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:5320
Total number of notes:23384

5270.0. "INCONSTATE crash @VAXCLUSTER_CACHE" by CSC32::REIGELMAN () Fri Mar 28 1997 00:18

Is the following a known issue. This footprint has been seem several time and
once told to apply VAXSYS14_061. Also see stars article titled.

 VAX INCONSTATE VAXCLUSTER_CACHE+... MOVB #34,17(R5) troubleshooting 


 ******************************* ENTRY    1242. *******************************
 ERROR SEQUENCE 19144.                           LOGGED ON:        SID 17000201
 DATE/TIME 27-MAR-1997 17:28:38.24                            SYS_TYPE 01110201
 SYSTEM UPTIME: 46 DAYS 04:49:50
 SCS NODE: HNE                                                 VAX/VMS V6.1

 FATAL BUGCHECK KA7AA-AA  CPU FW REV# 1.  CONSOLE FW REV# 1.1

 INCONSTATE, Inconsistent I/O data base

       PROCESS NAME    PCF

       PROCESS ID      0122027D

       ERROR PC        89BCEC5E
       ERROR PSL       00080009
                                       C-BIT
                                       N-BIT
                                       INTERRUPT PRIORITY LEVEL = 08.
                                       PREVIOUS MODE = KERNEL
                                       CURRENT MODE = KERNEL
                                       FIRST PART DONE CLEAR

 STACK POINTERS

 KSP 7FF116F8  ESP 7FFE9800  SSP 7FFECA44  USP 7FDF9310  ISP 89BC7DF8

 GENERAL REGISTERS

 R0  00002124  R1  000000C8  R2  019D00BB  R3  94635A00  R4  89BCEBF5
 R5  93B9CD00  R6  903C6200  R7  7FF11D20  R8  7FF11AB8  R9  7FF11ACC
 R10 7FF11AB8  R11 7FF11AC4  AP  7FF11844  FP  7FF11808  SP  7FF11780

 SYSTEM REGISTERS

       P0BR            B572B400
                                       P0 PTE BASE (VIRT ADDRS)
       P0LR            00019DAF
                                       TOTAL P0 PAGES
       P1BR            B5059000
                                       P1 PTE BASE (VIRT ADDRS)
       P1LR            001FEFB6
                                       TOTAL NON-EXISTENT P1 PAGES
       SBR             1F1A7600
                                       SYSTEM PTE BASE (PHYS ADDRS)
       SLR             00376280
                                       TOTAL PAGES "SYSTEM" VIRT MEM
       PCBB            71AACC20
                                       PCB BASE (PHYS ADDRS)
       SCBB            1F178800
                                       SCB BASE (PHYS ADDRS)
       ASTLVL          00000001
                                       EXECUTIVE MODE AST PENDING
       SISR            00000000
                                       INTERRUPT REQUEST ACTIVE = 0.
       ICCS            00000000
SDA> exam/inst 89BCEC5E
VAXCLUSTER_CACHE+0445E:  MOVB    #34,0B(R5)
SDA> exam/inst 89BCEC5E-20;20
VAXCLUSTER_CACHE+0443E:  CMPW    #244C,R0
VAXCLUSTER_CACHE+04443:  BEQL    VAXCLUSTER_CACHE+0445E
VAXCLUSTER_CACHE+04445:  CMPW    #2454,R0
VAXCLUSTER_CACHE+0444A:  BEQL    VAXCLUSTER_CACHE+0445E
VAXCLUSTER_CACHE+0444C:  CMPW    #2044,R0
VAXCLUSTER_CACHE+04451:  BEQL    VAXCLUSTER_CACHE+0445E
VAXCLUSTER_CACHE+04453:  CMPW    #0084,R0
VAXCLUSTER_CACHE+04458:  BEQL    VAXCLUSTER_CACHE+0445E
VAXCLUSTER_CACHE+0445A:  BUGW   #019C	 <<< Declare crash 
VAXCLUSTER_CACHE+0445E:  MOVB    #34,0B(R5) 

SDA> eval/cond 00002124		<<< unexpected service status !!! 
%SYSTEM-F-IVLOCKID, invalid lock ID
R5 is a CFCB

 **** Fatal BUG CHECK, version = V6.1     INCONSTATE, Inconsistent I/O data base

     Crash CPU: 01        Primary CPU: 00

     Active/available CPU masks: 0000000F/0000000F

     Current process = PCFS_SERVER

     Register dump

        R0 = 00002124
        R1 = 000000C8
        R2 = 019D00BB
        R3 = 94635A00
        R4 = 89BCEBF5
        R5 = 93B9CD00
        R6 = 903C6200
        R7 = 7FF11D20
        R8 = 7FF11AB8
        R9 = 7FF11ACC
        R10= 7FF11AB8
        R11= 7FF11AC4
        AP = 7FF11844
        FP = 7FF11808
        SP = 7FF11780
        PC = 89BCEC5E
        PSL= 00080009

     Kernel/interrupt/boot stack

        7FF11788  89BCE338
        7FF1178C  00002124
        7FF11790  000000C8
        7FF11794  019D00BB
        7FF11798  94635A00
        7FF1179C  89BCEBF5
        7FF117A0  93B9CD00
        7FF117A4  903C6200
        7FF117A8  7FF11D20
        7FF117AC  7FF11AB8
        7FF117B0  7FF11ACC
        7FF117B4  7FF11AB8
        7FF117B8  7FF11AC4
        7FF117BC  89BCEBF1
        7FF117C0  93B9CD00
        7FF117C4  89BCEB1C
        7FF117C8  933D2180
        7FF117CC  000000C8
        7FF117D0  00000000
        7FF117D4  94635A00
        7FF117D8  7FF11AC8
        7FF117DC  93B9CD00
        7FF117E0  903C6200
        7FF117E4  7FF11D20
        7FF117E8  7FF11AB8
        7FF117EC  7FF11ACC
        7FF117F0  7FF11AB8
        7FF117F4  7FF11AC4
        7FF117F8  89BCDE22
        7FF117FC  93B9CD00
        7FF11800  00000008
        7FF11804  89BCD03B
        7FF11808  00000000
        7FF1180C  2FFC0000
        7FF11810  7FF11894
        7FF11814  7FF1185C
        7FF11818  7FF24D83
        7FF1181C  00000000
        7FF11820  94635A00
        7FF11824  7FF11AC8
        7FF11828  7FF11A3C
        7FF1182C  903C6200
        7FF11830  7FF11D20
        7FF11834  7FF11AB8
        7FF11838  7FF11ACC
        7FF1183C  7FF11AB8
        7FF11840  7FF11AC4
        7FF11844  00000005
        7FF11848  94635A00
        7FF1184C  933D2180
        7FF11850  7FF11AB8
        7FF11854  7FF15D38
        7FF11858  7FF15DA9
        7FF1185C  00000000
        7FF11860  2BFC0000
        7FF11864  7FF11950
        7FF11868  7FF11918
        7FF1186C  7FF24A82
        7FF11870  00000000
        7FF11874  7FF11D20
        7FF11878  00000001
        7FF1187C  00000000
        7FF11880  903C6200
        7FF11884  7FF11D20

     Exec stack



     Process privileges

        B56C8600  FFF7FFFF
        B56C8604  FFFFFFFF


     Image name = DSA6:[SYS5.SYSCOMMON.][SYSEXE]PCFS_SERVER.EXE;3

     Loaded images

 [SYSMSG]SYSMSG.EXE                     89AA7E00 89AE6E00
 [SYS$LDR]SYSLDR_DYN.EXE                89D44E00 89D46E00
 [SYS$LDR]DDIF$RMS_EXTENSION.EXE        89D47400 89D48600
 [SYS$LDR]RECOVERY_UNIT_SERVICES.EXE    89D48800 89D49000
 [SYS$LDR]RMS.EXE                       89AE7200 89B12200
 VBSS.EXE                               89BC8600 89BCA200
 VAXCLUSTER_CACHE.EXE                   89BCA800 89BCF200
 SYS$NETWORK_SERVICES.EXE               89BCF800 89BCFA00
 SYS$UTC_SERVICES.EXE                   89BD0000 89BD0E00
 SYS$TRANSACTION_SERVICES.EXE           89BD1400 89BDD400
 SYS$IPC_SERVICES.EXE                   89BDD800 89BEFE00
 CPULOA.EXE                             89BF0000 89BF4E00
 LMF$GROUP_TABLE.EXE                    89BF7200 89BF8A00
 SYSLICENSE.EXE                         89BF8E00 89BFAC00
 SNAPSHOT_SERVICES.EXE                  89BFB200 89BFBE00
 SYSGETSYI.EXE                          89BFC400 89BFDC00
 SYSDEVICE.EXE                          89BFE000 89C00800
 MESSAGE_ROUTINES.EXE                   89C00E00 89C06C00
 EXCEPTION.EXE                          89C17200 89C20800
 LOGICAL_NAMES.EXE                      89C21000 89C23400
 SECURITY.EXE                           89C23E00 89C2D800
 LOCKING.EXE                            89C2E200 89C34A00
 PAGE_MANAGEMENT.EXE                    89C35400 89C3F000
 WORKING_SET_MANAGEMENT.EXE             89C7FE00 89C85800
 IMAGE_MANAGEMENT.EXE                   89C86200 89C89600
 EVENT_FLAGS_AND_ASTS.EXE               89C89C00 89C8B800
 IO_ROUTINES.EXE                        89C8C200 89C97600
 PROCESS_MANAGEMENT.EXE                 89C98A00 89CA4200
 ERRORLOG.EXE                           89D37200 89D37C00
 PRIMITIVE_IO.EXE                       89D38200 89D39400
 SYSTEM_SYNCHRONIZATION_SPC.EXE         89D39800 89D3DC00
 SYSTEM_PRIMITIVES_MIN.EXE              89D3E200 89D41E00


 **** Starting memory dump....



 **** Total memory too big for SDA, attempting subset dump

     Header and error log buffers dumped...
     SPT & GPT dumped...
     System space dumped...
     Global pages dumped...
     PCFS_SERVER dumped...
     AUDIT_SERVER dumped...
     NETACP dumped...
     REMACP dumped...
     _FTA378: dumped...
     IPCACP dumped...
     CONFIGURE dumped...
     SCHED_REMOTE dumped...
     DECW$TE_CAA2 dumped...
     CACHE_SERVER dumped...
     CLUSTER_SERVER dumped...
     OPCOM dumped...
     JOB_CONTROL dumped...
     QUEUE_MANAGER dumped...
     SHADOW_SERVER dumped...
     SECURITY_SERVER dumped...
     SMISERVER dumped...
     TP_SERVER dumped...
     MONITOR_SERVER dumped...
     EVL dumped...
     RAID$SERVER dumped...
     ACMS115SP001000 dumped...
     MULTINET_SERVER dumped...
     _RTA6: dumped...
     ACMS01EXC11A000 dumped...
     NFS_SERVER dumped...
     SMTP_SYMBIONT dumped...
     NFS_SERVERIO_1 dumped...
     LATACP dumped...
     RDMS_MONITOR dumped...
     BATCH_2085 dumped...
     MRLOGGER dumped...
     MR$T_N_1 dumped...
     MRG$GATEWAY dumped...
     MRLISTEN_33170 dumped...
     FG5_1 dumped...
     SYMBIONT_2 dumped...
     SERVER_0139 dumped...
     ACMS118SP005000 dumped...
     EPC$REGISTRAR dumped...
     ACMS115SP003001 dumped...
     DCSC$CHL_RCV_01 dumped...
     ACMS01TSC001000 dumped...
     ACMS_SWL dumped...
     ACMS01ACC001000 dumped...
     ACMS01ATL001000 dumped...
     ACMS01CP001000 dumped...
     ACMS11ASP005000 dumped...
     BATCH_1368 dumped...
     M68_1 dumped...
     ACMS117SP001000 dumped...
     SNARJE$SERVER dumped...
     SNARJE$MPX dumped...
     SERVER_014F dumped...
     RPC$SWL dumped...
     ACMS119SP001000 dumped...
     SNAEVL dumped...
     ACMS01QTI001000 dumped...
     ACMS118SP001000 dumped...
     D14 dumped...
     HITMAN          dumped...
     CarbonCopy dumped...
     RTMON dumped...
     F35 dumped...
     ACMS119SP006001 dumped...
     ACMS115SP002000 dumped...
     BATCH_6535 dumped...
     NBNS dumped...
     ACMS116SP009000 dumped...
     BATCH_7783 dumped...
     NETBIOS dumped...
     _NTY3333: dumped...
     FAL_33025 dumped...
     COOL_COPY dumped...
     ACMS116SP008001 dumped...
     ACMS01EXC118000 dumped...
     ACMS118SP003000 dumped...
     <Rexec_PNM> dumped...
     BATCH_5009 dumped...
     LP4 dumped...
     BATCH_1830 dumped...
     _NTY3332: dumped...
     ACMS116SP001000 dumped...
     DECW$FD dumped...
     ACMS115SP004002 dumped...
     ACMS116SP002001 dumped...
     ACMS115SP006003 dumped...
     ACMS116SP010001 dumped...
     ACMS116SP006001 dumped...
     BATCH_4942 dumped...
     ACMS01EXC119000 dumped...
     ACMS118SP006001 dumped...
     FAL_33195 dumped...
     SERVER_0138 dumped...
     _NTY3402: dumped...
     ACMS01EXC117000 dumped...
     VUE$OPER_PRD_2 dumped...
     ACMS116SP007000 dumped...
     DCSC$SUPERVISOR dumped...
     SLS$TAPMGRDB dumped...
     ACMS116SP004001 dumped...
     OPER_PRD dumped...
     _RTA1: dumped...
     SERVER_013E dumped...
     ACMS11ASP003000 dumped...
     ACMS119SP012002 dumped...
     _RTA3: dumped...
     _LTA8975: dumped...
     ACMS01EXC115000 dumped...
     OPERATOR dumped...
     _NTY3334: dumped...
     ACMS116SP003000 dumped...
     GRT dumped...
     ACMS11ASP001000 dumped...
     BATCH_973 dumped...
     ACMS117SP004000 dumped...
     LP4_1 dumped...
     BATCH_6968 dumped...
     CM_DVSC00000001 dumped...
     PSDC$DC_SERVER dumped...
     F54 dumped...
     ACMS115SP005002 dumped...
     ATR_Daemon dumped...
     ACMS119SP007002 dumped...
     ACMS01EXC116000 dumped...
     FAL_32770 dumped...
     SLS$OPCOM dumped...
     BATCH_4371 dumped...
     NSCHED dumped...
     ACMS117SP003000 dumped...
     VUE$OPER_PRD_3 dumped...
     FAL_32940 dumped...
     ACMS119SP004000 dumped...
     SCHED#_1963 dumped...
     ACMS119SP005004 dumped...
     ERRFMT dumped...
     ACMS11ASP004000 dumped...
     Control Master dumped...
     SWL_Daemon dumped...
     FG5 dumped...
     _LTA8332: dumped...
     HNSEC dumped...
     _FTA377: dumped...
     SERVER_0137 dumped...
     _FTA379: dumped...
     WKK dumped...
     JSK dumped...
     _RTA2: dumped...
     ACMS11ASP002000 dumped...
     SERVER_013F dumped...
     ACMS116SP005000 dumped...
     M68 dumped...
     ACMS119SP013002 dumped...
     ACMS119SP002000 dumped...
     ATTN_MANAGER dumped...
     ACMS118SP002001 dumped...
     ACMS118SP004001 dumped...
     S43 dumped...
     ACMS119SP003003 dumped...
     DECW$SESSION dumped...
     BATCH_4881 dumped...
     SLS$TAPMGRRQ dumped...
     DCSC$CHL_XMT_01 dumped...


 **** Memory dump complete....



 **** to shadow set member, unit ... 1190

Here is the MACRO that we are crashing in from the VBN_CACHE module.

1116 ; This MACRO assumes that R0 has an error code, i.e., BLBS R0 has failed
1117 ;   previous to invoking this MACRO
1118 ;  It also assume that R5 contains the CFCB address
1119
1120         .MACRO  CFCB_CHKLK, ?L1
1121         CMPW    #SS$_WRONGSTATE, R0     ; Multiple Actions
1122         BEQL    L1
1123         CMPW    #SS$_INSFMEM, R0        ; Memory problem
1124         BEQL    L1                      ; Yes
1125         CMPW    #SS$_INSFLPGS, R0       ; Memory problem
1126         BEQL    L1                      ; Yes
1127         CMPW    #SS$_INSFRPGS, R0       ; Memory problem
1128         BEQL    L1                      ; Yes
1129         CMPW    #SS$_INSFSPTS, R0       ; Memory problem
1130         BEQL    L1                      ; Yes
1131         CMPW    #SS$_DEVOFFLINE, R0     ; Lock Manager in Transition
1132         BEQL    L1                      ; Yes
1133         BUG_CHECK       INCONSTATE, FATAL
1134 L1:
1135         MOVB    #SPL$C_SCS, CFCB$B_SUBTYPE(R5)
1136         FORK_WAIT                       ; Try Later
1137         MOVB    #DYN$C_VCC_CFCB, CFCB$B_SUBTYPE(R5)
1138         .ENDM
1139


T.RTitleUserPersonal
Name
DateLines
5270.1JARETH::NORWICHFri Mar 28 1997 10:554
    
    How can I get to the dump.
    
    Phil
5270.2Tried CANASTA?XDELTA::HOFFMANSteve, OpenVMS EngineeringMon Mar 31 1997 15:396
:Is the following a known issue.

   Send the CLUE footprint to CANASTA -- see VMSNOTES 233.* for info.
   If CANASTA recognizes it, you'll get information back.  If not,
   then this crash can/will be added to the CANASTA database for any
   folks that might encounter this crash in the future...
5270.3more informationCSC32::REIGELMANThu Apr 03 1997 02:19174
    reply .1
     I gave Ronnie Millar the dial-in informastion to look at the
    dump. If there are any question please contact me at 592-4446
    14:00 00:00 mst. 
    
    also I found what look like the backward link for the hashtable
    is corrupted.
    
    
    forwarded this to Ronnie Millar
    try to format the CFCB that was in R5, couldn't so I dumped.
    
    
    \ ; Format of CFCB from STARS article titled "INCONSTATE Crash at
    \ ; VAXCLUSTER_CACHE+0BF6"
    \ ;
    \ CFCB$W_SIZE = 8             !
    \ CFCB$B_TYPE = 10 (A)        !
    \ CFCB$B_SUBTYPE = 11 (B)     !
    \ CFCB$L_HASHTABLE = 48 (30)  !
    \ CFCB$L_STATUS = 52 (34)     !
    \   CFCB$V_NOLOCK = 3         !
    \   CFCB$V_LIMBO = 9          !
    \ CFCB$L_VREAD = 56 (38)      !
    \ CFCB$L_READHIT = 60 (3C)    !
    \ CFCB$L_VWRITE = 64 (40)     !
    \ CFCB$L_BLOCKCNT = 76 (4C)   !
    \ CFCB$L_CLCNT = 80 (50)      !
    \ CFCB$L_HIVBN = 92 (5C)      !
    \ CFCB$L_FCB = 96 (60)        !
    \ CFCB$W_OCNT = 102 (66)      !
    \ CFCB$B_DISABLE = 104 (68)   !
    \ CFCB$Q_FREE_CLP = 108 (6C)  !
    \ CFCB$L_TIME = 116 (74)      !
    \ CFCB$Q_LIMBO = 120 (78)     !
    \ CFCB$L_CVCB = 132 (80)      !
    
    SDA> exam 93B9CD00;80
    00000000 206F00C0 00000000 00000000  ........�.o ....     93B9CD00
    013D0131 00000001 00000000 00000000  ............1.=.     93B9CD10
    00000000 00000000 00000000 00000000  ................     93B9CD20
    0000000B 0000001F 00000810 9231C700  .�1.............     93B9CD30
                                ^^^^
                                 |---hash table
    00000000 00000000 00000000 00000000  ................     93B9CD40
    00000001 00000000 00000000 00000000  ................     93B9CD50
    93B9CD6C 00000000 00030000 94635A00  .Zc.........l͹.     93B9CD60
                                ^^^^
                                 |---FCB
    00000000 00000000 00000000 93B9CD6C  l͹.............     93B9CD70
    
    there is a linkage back to CFCB
    
    SDA> format 94635A00
    94635A00   FCB$L_FCBFL                     94986A00
    94635A04   FCB$L_FCBBL                     945F1440
    94635A08   FCB$W_SIZE                          0130
    94635A0A   FCB$B_TYPE                        07
    94635A0B   FCB$B_ACCLKMODE                 04
    94635A0C   FCB$L_EXFCB                     00000000
    94635A10   FCB$L_WLFL                      94635A10
    94635A14   FCB$L_WLBL                      94635A10
    94635A18   FCB$W_REFCNT                        0000
    94635A1A   FCB$W_ACNT                      0000
    94635A1C   FCB$W_WCNT                          0001
    94635A1E   FCB$W_LCNT                      0000
    94635A20   FCB$W_TCNT                          0000
    94635A22   FCB$W_STATUS                    0000
    94635A24   FCB$W_FID                           0606
               FCB$W_FID_DIRNUM
               FCB$W_FID_NUM
    94635A26   FCB$L_FID_RECNUM                0006
               FCB$W_FID_SEQ
    94635A28   FCB$B_FID_RVN                         00
               FCB$W_FID_RVN
    94635A29   FCB$B_FID_NMX                       00
    94635A2A   FCB$W_SEGN                      0000
    94635A2C   FCB$L_STVBN                     00000001
    94635A30   FCB$L_STLBN                     00000000
    94635A34   FCB$L_HDLBN                     000F492A
    94635A38   FCB$L_FILESIZE                  00000003
    94635A3C   FCB$L_EFBLK                     00000001
    94635A40   FCB$W_VERSIONS                      0000
    94635A42   FCB$L_DIRINDX                   0000
    94635A44                                       0000
    94635A46   FCB$W_DIRSEQ                    0000
    94635A48   FCB$L_ACCLKID                   01EF0001
    94635A4C   FCB$L_LOCKBASIS                 00000606
    94635A50   FCB$L_NUMEXTENTS                00000000
               FCB$L_TRUNCVBN
    94635A54   FCB$L_CACHELKID                 00000000
    94635A58   FCB$L_HIGHWATER                 00000004
    94635A5C   FCB$L_NEWHIGHWATER              00000004
    94635A60   FCB$W_HWM_UPDATE                    0000
    94635A62   FCB$W_HWM_ERASE                 0000
    94635A64   FCB$W_HWM_PARTIAL                   0000
    94635A66   FCB$W_REVISION                  0001
    94635A68   FCB$L_HWM_WAITFL                94635A68
               FCB$L_LIMBOFL
               FCB$Q_HWMQHD
               FCB$Q_LIMBOQHD
    94635A6C   FCB$L_HWM_WAITBL                94635A68
               FCB$L_LIMBOBL
    94635A70   FCB$L_FILEOWNER                 07E30053
               FCB$W_UICMEMBER
               FCB$W_UICGROUP
    94635A74                                   0000FFFF
    94635A78                                   0449007C
    94635A7C                                   00000000
    94635A80   FCB$Q_ACMODE                    FFFFFFFF  PDT$C_PE_MFQ_THRESHOLD
    94635A84                                   FFFFFFFF  PDT$C_PE_MFQ_THRESHOLD
    94635A88   FCB$L_SYS_PROT                  FFFFFFE0     CDRP$Q_NT_PRVMSK
               FCB$W_FILEPROT
    94635A8C   FCB$L_OWN_PROT                  FFFFFFE0  CDRP$Q_NT_PRVMSK
    94635A90   FCB$L_GRP_PROT                  FFFFFFFF  PDT$C_PE_MFQ_THRESHOLD
    94635A94   FCB$L_WOR_PROT                  FFFFFFFF  PDT$C_PE_MFQ_THRESHOLD
    94635A98   FCB$L_ACLFL                     90694EC0
    94635A9C   FCB$L_ACLBL                     90694EC0
    94635AA0                                   00000000
    94635AA4                                   00000000
    94635AA8                                   00000000
    94635AAC                                   00000000
    94635AB0                                   00000000
    94635AB4                                   00000000
    94635AB8                                   00000000
    94635ABC                                   00000000
    94635AC0                                   00000000
    94635AC4                                   00000000
    94635AC8                                   00000000
    94635ACC                                   00000000
    94635AD0                                   8FD54920
    94635AD4                                   00000000
    94635AD8                                   00000000
    94635ADC                                   00000000
    94635AE0                                   00000000
    94635AE4                                   00000000
    94635AE8                                   00000000
    94635AEC                                   00000000
    94635AF0                                   00000000
    94635AF4                                   00000000
    94635AF8                                   00000000
    94635AFC                                   00000000
    94635B00                                   00000000
    94635B04                                   00000000
    94635B08                                   00000000
    94635B0C                                   00000000
    94635B10                                   00000000
    94635B14                                   00000000
    94635B18   FCB$L_ORB                       94635A70
    94635B1C   FCB$L_CFCB                      93B9CD00 <--- link back to CFCB
    94635B20   FCB$L_DIRLCKID                  00000000
    94635B24   FCB$L_PRIMFCB                   00000000
               FCB$C_LENGTH
    
    
    hastable won't format out
    SDA> format 9231C700
    %SDA-E-NOSYMBOLS, no "HT" symbols found to format this block
    SDA> exam 9231C700;50
    9231C70C 036F0040 00040204 FFFB32C0  �2�[email protected]..�1.     9231C700
    9231C71C 9231C714 9231C714 9231C70C  .�1..�1..�1..�1.     9231C710
    0001007B 9231C724 9231C724 9231C71C  .�1.$�1.$�1.{...     9231C720
    00000000 00000000 0000D000 0000FFC0  �..............     9231C730
    89C31F96 34510038 A4678210 92341180  ..4...g8.Q4..�.     9231C740
    
    backlink looks wrong tried to valid it.
    
    SDA> val que/sel 9231C700
    Error comparing backward link to previous structure address (9231C700)
    Error occurred in queue element at address 922CF9C0, after tracing 0
    elements