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
Storage Layout
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   48  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  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     48
STOATC_CALCYLNO        20      4
STOATC_CALFLAGS        1B      1
STOATC_CALSTART        24      4
STOATC_CALTYPE         1C      4
STOATC_CPVOLSER        14      6
STOATC_END             30      0
STOATC_FBA             1B           80
STOATC_MRHDR            0      0
STOATC_RDCPCYL         28      4
STOATC_RDEVSID         2C      4

This information is based on z/VM V4R3.0.
Last updated on 1 May 2002 at 16:20:33.
Copyright IBM Corporation, 1990, 2002