Programming Interface Information:
The Monitor Records are intended Programming Interfaces that
allow the customer to write programs to obtain services of z/VM.

MRIODMDE

Prolog
Control Block Contents
Cross Reference

MRIODMDE Prolog

 DSECT NAME - IODMDE
 FUNCTION - Map a Monitor record.
 LOCATED BY -
        Through the Monitor Control Area
 REFERENCED CONTROL BLOCKS -
        MRRECHDR    Monitor Record Header
 NAME - MRIODMDE
 DESCRIPTIVE NAME - Monitor Event Record
                    Domain 6 - I/O Domain
                    Record 31- Minidisk Activity
 DESCRIPTION - Indicates Minidisk Cache (MDC) setting has been
               changed automatically by CP

MRIODMDE Control Block Contents

Offsets
Dec  Hex  Type        Len  Name (Dim)             Description
 
   0   0  Structure    84  IODMDE                 Start of monitor record
   0   0  Character     0  IODMDE_MRHDR           Record header. See MRRECHDR
                                                  for details.
   0   0  Character    20  MRHDR
   0   0  Unsigned      2  MRHDRLEN
   2   2  Unsigned      2  MRHDRZER
   4   4  Unsigned      1  MRHDRDM
   5   5  Unsigned      1  *
   6   6  Unsigned      2  MRHDRRC
   8   8  Character     8  MRHDRTOD
  16  10  Character     4  *
  20  14  Character     0  MRHDR_END
  20  14  Character     8  IODMDE_MDIOUSER        Minidisk owner userid
  28  1C  Bitstring     2  IODMDE_MDIOVDEV        Minidisk owner VDEV number
  30  1E  Character    40  IODMDE_EQIDUID         EQID of real device
  70  46  Bitstring     4  IODMDE_MDIVSEXT        Start extent
  74  4A  Bitstring     4  IODMDE_MDIVEEXT        End extent
  78  4E  Bitstring     1  IODMDE_CALFLAGS        Flag Byte
          1... ....        IODMDE_MDCSETTG         OFF = XDISK set MDC OFF ON
                                                  = XDISK doesn't care
          .1.. ....        IODMDE_EQIDUHSH         ON = system generated EQID
                                                  which is 40 bytes in
                                                  IODMDE_EQIDUID OFF = user
                                                  generated EQID which is 8
                                                  bytes in IODMDE_EQIDUID
          ..1. ....        *
          ...1 ....        *
          .... 1...        *
          .... .1..        *
          .... ..1.        *
          .... ...1        *
  79  4F  Character     1  *                      Reserved for IBM use
  80  50  Unsigned      2  IODMDE_RDEVDEV         Real device number
  82  52  Unsigned      2  *                      Reserved for IBM use
  84  54  Character     0  IODMDE_END

MRIODMDE Cross Reference

                      Hex           Hex
Name                  Offset Length Value
 
IODMDE                     0     84
IODMDE_CALFLAGS           4E      1
IODMDE_END                54      0
IODMDE_EQIDUHSH           4E           40
IODMDE_EQIDUID            1E     40
IODMDE_MDCSETTG           4E           80
IODMDE_MDIOUSER           14      8
IODMDE_MDIOVDEV           1C      2
IODMDE_MDIVEEXT           4A      4
IODMDE_MDIVSEXT           46      4
IODMDE_MRHDR               0      0
IODMDE_RDEVDEV            50      2
MRHDR                      0     20
MRHDR_END                 14      0
MRHDRDM                    4      1
MRHDRLEN                   0      2
MRHDRRC                    6      2
MRHDRTOD                   8      8
MRHDRZER                   2      2

This information is
based on z/VM V7R3.0.

Last updated on 09 September 2022 at 14:50:05.

Copyright IBM Corporation, 1990, 2022