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

#### MRIODALS

Prolog
Control Block Contents
Cross Reference

#### MRIODALS Prolog

     DSECT NAME - IODALS
     FUNCTION - Map the Monitor Record for Domain 6, Record 10
     LOCATED BY -
            Through the Monitor Control Area
     REFERENCED CONTROL BLOCKS -
            MRRECHDR    Monitor Record Header
     NAME - MRIODALS
     DESCRIPTIVE NAME - Monitor Event Record
                        Domain 6  - I/O Domain
                        Record 10 - Automated Tape Library Statistics
     DESCRIPTION -  Statistics data of the 3495 Tape Library Dataserver,
                    obtained from the tape controller with a Read
                    Subsystem Data CCW in response to an unsolicited
                    unit check with an ERA code of x'7A' in the sense.
     NOTES:
      - The statistics data in IODALS_DATA pertains only to the 3495
        device and not to a tape unit or tape control unit.  The mapping
        of these statistics is documented in the hardware reference
        manual for the 3494 Tape Library Dataserver.
      - In order to collect this record on a regular basis, the entire
        range of tape units under the control of the 3495 Dataserver
        should be enabled for event monitoring in the I/O  domain.
      - IODALS_CALDATOF should always be used to locate the IODALS_DATA
        data area.  Its value may change.

#### MRIODALS Control Block Contents

    Offsets
    Dec  Hex  Type        Len  Name (Dim)             Description

       0   0  Structure    28  IODALS                 Start of monitor record
       0   0  Character     0  IODALS_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  Signed        2  IODALS_CALDATOF        Byte offset, relative from
                                                      the start of this record, to
                                                      the IODALS_DATA library
                                                      statistics area
      22  16  Signed        2  IODALS_CALDATLN        Length, in bytes, of the
                                                      IODALS_DATA library
                                                      statistics area
      24  18  Unsigned      2  IODALS_RDEVDEV         Real device address
      26  1A  Unsigned      2  *                      Reserved for IBM use
      28  1C  Character     0  IODALS_DATA            Library Statistics data, as
                                                      returned by the 3495 Control
                                                      Unit. IODALS_CALDATOF should
                                                      be used to get the correct
                                                      location. IODALS_CALDATLN
                                                      should be used to get the
                                                      length.

#### MRIODALS Cross Reference

                          Hex           Hex
    Name                  Offset Length Value

    IODALS                     0     28
    IODALS_CALDATLN           16      2
    IODALS_CALDATOF           14      2
    IODALS_DATA               1C      0
    IODALS_MRHDR               0      0
    IODALS_RDEVDEV            18      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 V7R2.0.

    Last updated on 05 August 2020 at 20:33:47.

    Copyright IBM Corporation, 1990, 2020