VOLSECT Back to Index page
 
Prolog 
Control Block Contents 
   VOLSECT DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This page documents intended Programming Interfaces that
allow the customer to write programs to obtain the services of z/VM.


  VOLSECT Prolog Top of page
  
 NAME       : VOLSECT
 DESCRIPTION: Volume ID Storage
 DSECT      : VOLSECT
 NOTES      : VOLSECT is primarily used to hold
              additional user supplied volume ID's. If the
              user supplied more than 16 volume ID's storage
              is obtained for a VOLSECT which can hold 24
              additional volume ID's. The field 'LABVSECT' in
              LABSECT points to the first VOLSECT. Additional
              VOLSECTs are forward pointed to by the field
              'VOLNSECT' contained in the first 4 bytes of a
              VOLSECT.
 
 
  VOLSECT Control Block Content Top of page
  




 VOLSECT DSECT
Top of page


Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      VOLSECT        Volume ID Storage
0000    0 Address      4 VOLNSECT       FOWRARD CHAIN POINTER
0004    4 Character  192 VOLAVOLS       SPACE FOR 24 ADDITIONAL VOLIDS
00C4  196 Bitstring    4 VOLEND         FENCE FOR END OF VOLIDS
          00000019       VOLSIZE        (*-VOLSECT+7)/8 SIZE OF VOLSECT
                                        IN DOUBLE WORDS
 
 
  VOLSECT Storage Layout Top of page
  
          
*** VOLSECT - Volume ID Storage
*
*     +---------------------------+---------------------------+
*   0 |         VOLNSECT          |                           |
*     +---------------------------+                           |
*   8 |                                                       |
*     =                       VOLAVOLS                        =
*     |                           +---------------------------+
*  C0 |                           |          VOLEND           |
*     +---------------------------+---------------------------+
*  C8
*
*** VOLSECT - Volume ID Storage
 
 
  VOLSECT Cross Reference Top of page
  
 
Symbol         Dspl Value
-------------- ---- -----
VOLAVOLS       0004
VOLEND         00C4
VOLNSECT       0000
VOLSIZE        00C4 00000019
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 16:02:00 EDT.
Copyright IBM Corporation, 1990, 2022