XDSBK Back to Index page
 
Prolog 
Control Block Contents 
   XDSBK 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.


  XDSBK Prolog Top of page
  
 NAME       : HCPXDSBK
 DESCRIPTION: XDISK services system information
 DSECT      : XDSBK
 FUNCTION   : System wide information for XDISK services
 LOCATED BY : SYSXDISK
 CREATED BY : HCPXDLEN
 DELETED BY : None
 REFERENCES : None
 SERIALIZED : The socket id field (XDSOCKET) is created/filled in during
              CP initialization and requires no serialization.  All other
              fields are updated using Compare and Swap.
 COMPATIBILITY AND MIGRATION CONCERNS : None
 RELOCATION CONSIDERATIONS : None
 
 
  XDSBK Control Block Content Top of page
  




 XDSBK DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      XDSBK          XDISK services system information
0000    0 Signed       4 XDSOCKET       Socket ID for XDISK services
0004    4 Signed       4 XDSLKTOT       Count of times LINK command has
                                        been issued on this system
0008    8 Signed       4 XDSLKPLX       Count of times SSI was consulted
                                        for LINK command
0010   16 Dbl-Word     8 XDSLKTOD       Cumulative time for LINK command
                                        to consult with SSI
0018   24 Signed       4 XDSDTTOT       Count of times DETACH command
                                        issued on this system
001C   28 Signed       4 XDSDTPLX       Count of times SSI was consulted
                                        for DETACH command
0020   32 Dbl-Word     8 XDSDTTOD       Cumulative time for DETACH
                                        command to consult with SSI
0028   40 Signed       4 XDSWKTOT       Count of times WRKALLEG used (SET
                                        WRKALLEG, DASDOPT WRKALLEG or
                                        MINIOPT WRKALLEG)on this system.
002C   44 Signed       4 XDSWKPLX       Count of times SSI consulted for
                                        WRKALLEG
0030   48 Dbl-Word     8 XDSWKTOD       Cumulative time for WRKALLEG to
                                        consult with SSI
0038   56 Signed       4 XDSQLTOT       Count of times QUERY LINKS issued
                                        on this system
003C   60 Signed       4 XDSQLPLX       Count of times SSI consulted for
                                        QUERY LINKS
0040   64 Dbl-Word     8 XDSQLTOD       Cumulative time for QUERY LINK to
                                        consult with SSI
0048   72 Signed       4 XDSLKRSP       Number of LINK responses for
                                        other SSI members
004C   76 Signed       4 XDSDTRSP       Number of DETACH responses for
                                        other SSI members
0050   80 Signed       4 XDSWKRSP       Number of WRKALLEG responses for
                                        other SSI members
0054   84 Signed       4 XDSQLRSP       Number of Q LINKS responses for
                                        other SSI members
0058   88 Signed       4 XDSMDCHG       Number of MDC changes made on
                                        this system based on other SSI
                                        members requests.
005C   92 Bitstring    1 XDSFLAG        Flag byte
          1... ....      XDSSPLDN       X'80' XDSSPLDN SPOL volume
                                        checking already done
          .1.. ....      XDSZIADN       X'40' XDSZIADN CP disks have been
                                        reaccessed
          ..1. ....      XDSXLKNR       X'20' XDSXLKNR Don't reply to XLK
                                        requests
005D   93 Bitstring    1 XDSOCKER       XDSOCKET error code
005E   94 Bitstring    1 * (2)          Reserved for future IBM use
0060   96 Dbl-Word     8 XDSTOKEN       XDISK Service Token
0068  104 Signed       2 XDSHGBST       Highest priority boost ever seen
                                        across this interval.
006A  106 Bitstring    1 * (6)          Reserved for future IBM use
          0000000E       XDSSIZE        (*-XDSBK+7)/8 size in double
                                        words
 
 
  XDSBK Storage Layout Top of page
  
          
*** XDSBK - XDISK services system information
*
*     +---------------------------+---------------------------+
*   0 |         XDSOCKET          |         XDSLKTOT          |
*     +---------------------------+---------------------------+
*   8 |         XDSLKPLX          |///////////////////////////|
*     +---------------------------+---------------------------+
*  10 |                       XDSLKTOD                        |
*     +---------------------------+---------------------------+
*  18 |         XDSDTTOT          |         XDSDTPLX          |
*     +---------------------------+---------------------------+
*  20 |                       XDSDTTOD                        |
*     +---------------------------+---------------------------+
*  28 |         XDSWKTOT          |         XDSWKPLX          |
*     +---------------------------+---------------------------+
*  30 |                       XDSWKTOD                        |
*     +---------------------------+---------------------------+
*  38 |         XDSQLTOT          |         XDSQLPLX          |
*     +---------------------------+---------------------------+
*  40 |                       XDSQLTOD                        |
*     +---------------------------+---------------------------+
*  48 |         XDSLKRSP          |         XDSDTRSP          |
*     +---------------------------+---------------------------+
*  50 |         XDSWKRSP          |         XDSQLRSP          |
*     +---------------------------+------+------+-------------+
*  58 |         XDSMDCHG          |:FLAG |:OCKER|/////////////|
*     +---------------------------+------+------+-------------+
*  60 |                       XDSTOKEN                        |
*     +-------------+-----------------------------------------+
*  68 |  XDSHGBST   |/////////////////////////////////////////|
*     +-------------+-----------------------------------------+
*  70
*
*** XDSBK - XDISK services system information
 
 
  XDSBK Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
XDSDTPLX       001C
XDSDTRSP       004C
XDSDTTOD       0020
XDSDTTOT       0018
XDSFLAG        005C
XDSHGBST       0068
XDSLKPLX       0008
XDSLKRSP       0048
XDSLKTOD       0010
XDSLKTOT       0004
XDSMDCHG       0058
XDSOCKER       005D
XDSOCKET       0000
XDSQLPLX       003C
XDSQLRSP       0054
XDSQLTOD       0040
XDSQLTOT       0038
XDSSIZE        006A 0000000E
XDSSPLDN       005C 80
XDSTOKEN       0060
XDSWKPLX       002C
XDSWKRSP       0050
XDSWKTOD       0030
XDSWKTOT       0028
XDSXLKNR       005C 20
XDSZIADN       005C 40
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:58:08 EDT.
Copyright IBM Corporation, 1990, 2022