MPEBK | Back to Index page

| Prolog Control Block Contents MPEBK 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.

MPEBK Prolog | Top of page

     NAME       : HCPMPEBK
     DESCRIPTION: Minidisk pool extent block.
     DSECT      : MPEBK
     FUNCTION   : A MPEBK contains all the necessary information
                  for mapping of a minidisk pool.
     LOCATED BY : VMDMPEBK  - Contains the pointer to MPEBK.
     CREATED BY : HCPAMD44  When a Diagnose 244 is issued by the user.
     DELETED BY : HCPAMD44  During an identify pool function.
                  HCPMSMDP  Delete minidisk-pool operation.
     RELOCATION CONSIDERATIONS : None
     COMMENTS   :

MPEBK Control Block Content | Top of page

     MPEBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      MPEBK          Minidisk pool extent block.
    0000    0 Signed       4 MPECTEXT       Total count of minidisk extents
                                            for this pool.
    0004    4 Signed       4 *              Reserved for IBM use.
                 The fields contained in MPEDX1DA must be on a
          doubleword boundary to be accessed concurrently.
    0008    8 Dbl-Word     8 MPEDX1DA (0)
    0008    8 Signed       4 MPEDX1CT       Count of DX1BK entries.
    000C   12 Address      4 MPEDX1BK       Address of DX1BK block
    0010   16 Dbl-Word     8 MPESPLCK (6)   Minidisk pool spin lock.
              00000040       MPELEN         *-MPEBK MPEBK size in bytes
              00000008       MPESIZE        (((*-MPEBK)+7)/8) MPEBK size in
                                            doublewords

MPEBK Storage Layout | Top of page

    *** MPEBK - Minidisk pool extent block.
    *
    *     +---------------------------+---------------------------+
    *   0 |         MPECTEXT          |///////////////////////////|
    *     +---------------------------+---------------------------+
    *   8 |         MPEDX1CT          |         MPEDX1BK          |
    *     +---------------------------+---------------------------+
    *  10 |                                                       |
    *     =                       MPESPLCK                        =
    *     |                                                       |
    *     +-------------------------------------------------------+
    *  40
    *
    *** MPEBK - Minidisk pool extent block.

MPEBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    MPECTEXT       0000
    MPEDX1BK       000C
    MPEDX1CT       0008
    MPEDX1DA       0008
    MPELEN         0010 00000040
    MPESIZE        0010 00000008
    MPESPLCK       0010

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:29:16 EDT.
Copyright IBM Corporation, 1990, 2020