MRIODALS

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 V7R3.0.

Last updated on 09 September 2022 at 12:19:47.

Copyright IBM Corporation, 1990, 2022