DFMBK Back to Index page
 
Prolog 
Control Block Contents 
   DFMBK DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  DFMBK Prolog Top of page
  
 NAME       : HCPDFMBK
 DESCRIPTION: Dump file map record
 DSECT      : DFMBK
 FUNCTION   : Contains the relative record number of each part
              of a dump file, created by Hard ABEND, S/A Dump,
              VMDUMP or Non-Destructive dump.
 LOCATED BY : The DFMBK is always the second record in a dump file.
 CREATED BY : HCPABB, HCPDMP, HCPVDU or SADUxx.
 DELETED BY : Not applicable
 RELOCATION CONSIDERATIONS : None
 COMMENTS   : The DFMBK maps a 4K record that is written
              to a dump file.
 
 
  DFMBK Control Block Content Top of page
  




 DFMBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      DFMBK          Dump file map record
0000    0 Character    8 DFMBKID        Identification string
0008    8 Signed       4 DFMDFIR        Record number of 1st DFIR Page
000C   12 Signed       4 DFMSDXBK       Record number of the stand-alone
                                        dump index record
0010   16 Signed       4 DFMDALBK       Record number of the first access
                                        list record
0014   20 Signed       4 DFMDALNO       Number of access list records
0018   24 Signed       4 DFMCOUNT       Number of address spaces in the
                                        SDF, and once processed into a
                                        CMS file, this is the number of
                                        related dump files that can be
                                        created, if all goes well.
          0000001C       DFMSIZE        *-DFMBK Length of fixed portion
                                        of the DFMBK
001C   28 Signed       4 DFMASIBK       Record number of ASIBK for each
                                        dumped address space
          00000004       DFMASILN       *-DFMASIBK Length of repeatable
                                        section
      DFMMAX defines the maximum number of ASIBKs that one
      DFMBK can address.
          000003F9       DFMMAX         (4096-DFMSIZE)/4
 
 
  DFMBK Storage Layout Top of page
  
          
*** DFMBK - Dump file map record
*
*     +-------------------------------------------------------+
*   0 |                       DFMBKID                         |
*     +---------------------------+---------------------------+
*   8 |         DFMDFIR           |         DFMSDXBK          |
*     +---------------------------+---------------------------+
*  10 |         DFMDALBK          |         DFMDALNO          |
*     +---------------------------+---------------------------+
*  18 |         DFMCOUNT          |         DFMASIBK          |
*     +---------------------------+---------------------------+
*  20
*
*** DFMBK - Dump file map record
 
 
  DFMBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
DFMASIBK       001C
DFMASILN       001C 00000004
DFMBKID        0000
DFMCOUNT       0018
DFMDALBK       0010
DFMDALNO       0014
DFMDFIR        0008
DFMMAX         001C 000003F9
DFMSDXBK       000C
DFMSIZE        0018 0000001C
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:49:02 EDT.
Copyright IBM Corporation, 1990, 2022