USVOL - 32-bit CP - V4R4.0

Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

#### USVOL

Prolog

Control Block Contents
USVOL DSECT

Storage Layout

Cross Reference (Contains links to field and bit definitions)

#### USVOL Prolog

     Name       : HCPUSVOL
     Description: User volume descriptor
     DSECT      : USVOL
     Function   : The USVOL area is used to describe the user
                  volume list, the user volume include list
                  and the user volume exclude list.
     Located by : SYSUVOL, SYSIVOL, and SYSXVOL in SYSCM
     Created by : HCPSYS, HCPZPQ
     Deleted by : no one

#### USVOL Control Block Content

#### USVOL DSECT

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      USVOL          User volume descriptor
    0000    0 Address      4 USVNEXT        Pointer to next chunk or store
    0004    4 Signed       4 USVCOUNT       Count of volsers in this chunk
              00000008       USVHDR         *-USVOL Length of header
              00000001       USVHDRD        (*-USVOL+7)/8 Length of header in
                                            dwords
    0008    8 Character    6 USVOLSER       First volser in chunk

#### USVOL Storage Layout

    *** USVOL - User volume descriptor
    *
    *     +---------------------------+---------------------------+
    *   0 |         USVNEXT           |         USVCOUNT          |
    *     +---------------------------+-------------+-------------+
    *   8 |                USVOLSER                 | E
    *     +-----------------------------------------+
    *
    *** USVOL - User volume descriptor

#### USVOL Cross Reference

    Symbol         Dspl Value
    -------------- ---- -----
    USVCOUNT       0004
    USVHDR         0004 00000008
    USVHDRD        0004 00000001
    USVNEXT        0000
    USVOLSER       0008

This information is based on z/VM V4R4.0. Last updated on 29 Jul 2003 at 16:32:21 EDT.
Copyright IBM Corporation, 1990, 2003