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   24  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            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  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  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     24
IODALS_CALDATLN        16      2
IODALS_CALDATOF        14      2
IODALS_DATA            18      0
IODALS_MRHDR            0      0
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 V4R4.0.

Last updated on 22 Jul 2003 at 15:04:23.

Copyright IBM Corporation, 1990, 2003