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