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 V5R4.0.

Last updated on 5 Sep 2008 at 09:11:41.

Copyright IBM Corporation, 1990, 2008