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

#### MRSTOATC

Prolog
Control Block Contents
Cross Reference

#### MRSTOATC Prolog

####

####

     DSECT NAME - STOATC
     FUNCTION - Map a Monitor record.
     LOCATED BY -
            Through the Monitor Control Area
     REFERENCED CONTROL BLOCKS -
            MRRECHDR    Monitor Record Header
     NAME - MRSTOATC
     DESCRIPTIVE NAME - Monitor Event Record
                        Domain 3 - Storage Domain
                        Record 7 - Page/Spool Area of a CP Volume
     DESCRIPTION - Describes a paging or spooling area in a CP volume
                   that had just been attached.  A separate record is
                   generated for each paging area and each spooling area
                   on the volume.
     NOTES:
       - The CP volume, as a device, is described in MRIODATD (Domain 6,
         Record 5).  MRSTOATC describes the storage area on it.

    MRSTOATC Control Block Contents

    Offsets
    Dec Hex  Type       Len  Name (Dim)             Description

      0   0  Structure   52  STOATC                 Start of monitor record
      0   0  Character    0  STOATC_MRHDR           Record header. See MRRECHDR
                                                    for details.
      0   0  Character   20  MRHDR
      0   0  Unsigned     2  MRHDRLEN               record length in bytes
      2   2  Unsigned     2  MRHDRZER               field of zeros
      4   4  Unsigned     1  MRHDRDM                domain identifier
      5   5  Unsigned     1  *
      6   6  Unsigned     2  MRHDRRC                record identifier
      8   8  Character    8  MRHDRTOD               Time at which this record was
                                                    built. In time-of-day (TOD)
                                                    clock format. See IBM System
                                                    370 XA Principle of Operation
                                                    for explanation of format.
     16  10  Character    4  *
     20  14  Character    0  MRHDR_END              End of header
     20  14  Character    6  STOATC_CPVOLSER        Volume serial identifier
     26  1A  Character    1  *                      Reserved for IBM use
     27  1B  Bitstring    1  STOATC_CALFLAGS        Flag byte
              1... ....      STOATC_FBA             When on, this device is a FBA
                                                    (Fixed Block Access) DASD.
              .1.. ....      *
              ..1. ....      *
              ...1 ....      *
              .... 1...      *
              .... .1..      *
              .... ..1.      *
              .... ...1      *
     28  1C  Character    4  STOATC_CALTYPE         'PAGE' = paging space. 'SPOL'
                                                    = spooling space.
     32  20  Signed       4  STOATC_CALCYLNO        Space allocation. Number of
                                                    cylinders for a non-FBA DASD,
                                                    or number of pages for a FBA
                                                    DASD. See STOATC_FBA
     36  24  Signed       4  STOATC_CALSTART        Start of the paging or
                                                    spooling area. A cylinder
                                                    number for a non-FBA DASD, or a
                                                    page number for a FBA DASD. See
                                                    STOATC_FBA
     40  28  Signed       4  STOATC_RDCPCYL         Number of pages per cylinder.
                                                    Not applicable for FBA devices.
                                                    See STOATC_FBA
     44  2C  Unsigned     4  STOATC_RDEVSID         Host subchannel id
     48  30  Unsigned     2  STOATC_RDEVDEV         Device number
     50  32  Unsigned     2  *                      Reserved and available for
                                                    IBM use.
     52  34  Character    0  STOATC_END

    MRSTOATC Cross Reference

                          Hex           Hex
    Name                 Offset Length Value

    MRHDR                      0     20
    MRHDR_END                 14      0
    MRHDRDM                    4      1
    MRHDRLEN                   0      2
    MRHDRRC                    6      2
    MRHDRTOD                   8      8
    MRHDRZER                   2      2
    STOATC                     0     52
    STOATC_CALCYLNO           20      4
    STOATC_CALFLAGS           1B      1
    STOATC_CALSTART           24      4
    STOATC_CALTYPE            1C      4
    STOATC_CPVOLSER           14      6
    STOATC_END                34      0
    STOATC_FBA                1B           80
    STOATC_MRHDR               0      0
    STOATC_RDCPCYL            28      4
    STOATC_RDEVDEV            30      2
    STOATC_RDEVSID            2C      4

    This information is
    based on z/VM V6R1.0.

    Last updated on 8 Oct 2009 at 21:08:13.

    Copyright IBM Corporation, 1990, 2009