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Programming Interface Information:
The Monitor Records are intended Programming Interfaces that allow the customer to write programs to obtain services of z/VM. |
MRIODALS
PrologControl Block Contents
Cross Reference
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