ALTREC Back to Index page
 
Prolog 
Control Block Contents 
   ALTREC DSECT
Storage Layout 
Cross Reference (Contains links to field and bit definitions)
Programming Interface Information:
This information is NOT intended to be
used as Programming Interfaces of z/VM.


  ALTREC Prolog Top of page
 
 NAME       : ALTREC
 DESCRIPTION: ALERT RECORDING RECORD
 DSECT      : ALTREC
 FUNCTION   : ALTREC PROVIDES ERROR, SENSE, AND OTHER
              STATISTICAL DATA NEEDED FOR ERROR RECORDING
              ON A SPECIFIED CHANNEL-ATTACHED I/O DEVICE.
              ALTREC MAPS THE NON-DEVICE SPECIFIC INFORMATION
              AND SDMALT MAPS THE STORAGE DEVICE SPECIFIC
              INFORMATION.  MODULES WHICH BUILD ALERT RECORDS
              FOR STORAGE DEVICES MUST COPY BOTH THE SDMALT &
              ALTREC CONTROL BLOCKS.
 LOCATED BY : N/A
 CREATED BY : HCPDUC
 DELETED BY : HCPIOE AFTER HCPREC HAS COPIED IT INTO
              A GSDBK.
 RELOCATION CONSIDERATIONS : None
 
 
  ALTREC Control Block Content Top of page
 

 ALTREC DSECT Top of page
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure ALTREC ALERT RECORDING RECORD THIS CONTROL BLOCK IS AN INTER-OPERATING-SYSTEM BLOCK WHICH IS DEFINED BY IBM CORPORATE STANDARDS. THEREFORE VM/XA DOES NOT CONTROL THE DEFINITIONS NOR DOES IT NECESSARILY USE ALL THE FIELDS DEFINED OR ALL THE BITS DEFINED WITHIN A FIELD. 0000 0 Bitstring 16 ALTHDR (0) ALERT RECORD HEADER 0000 0 Bitstring 1 ALTHTYPE RECORD TYPE 000000A3 ALTRECRD 163 ALTRECRD ALERT RECORD TYPE CODE (X'A3') 0001 1 Bitstring 1 ALTSYS SYSTEM/RELEASE LEVEL 111. .... HDRHSSYS X'E0' HDRHSSYS SYSTEM MASK 1... .... HDRHSOS2 X'80' HDRHSOS2 OS/VS2 .11. .... HDRHSVM X'60' HDRHSVM VM .1.. .... HDRHSOS1 X'40' HDRHSOS1 OS/VS1 ..1. .... HDRHSDOS X'20' HDRHSDOS DOS ...1 1111 HDRHSLVL X'1F' HDRHSLVL SYSTEM LEVEL MASK (INCLUDES VERSION AND RELEASE LEVEL) ...1 11.. HDRHSVRS X'1C' HDRHSVRS VERSION NUMBER MASK .... ..11 HDRHSREL X'03' HDRHSREL RELEASE LEVEL MASK 0002 2 Bitstring 1 ALTSWS0 SWITCH BYTE ZERO (0) 0003 3 Bitstring 1 ALTSWS1 SWITCH BYTE ONE (1) ...1 .... ALTDASIM X'10' ALTDASIM SERVICE INFORMATIONAL MESSAGE (SIM) 0004 4 Bitstring 1 ALTSWS2 SWITCH BYTE TWO (2) 1... .... ALTCHPVA X'80' ALTCHPVA DASD SERVICE INFORMATIONAL MESSAGE (SIM) 0005 5 Bitstring 1 ALTSWS3 SWITCH BYTE THREE (3) 0006 6 Bitstring 1 ALTRDCNT RECORD COUNT 1111 .... HDRRCSEQ X'F0' HDRRCSEQ RECORD SEQUENCE NUMBER MASK .... 1111 HDRRCPHY X'0F' HDRRCPHY TOTAL NUM. OF PHYSICAL RECORDS IN LOGICAL RECORD BIT MASK 0007 7 Bitstring 1 * RESERVED FOR FUTURE IBM USE 0008 8 Dbl-Word 8 ALTSFTOD TOD OF SYSTEM FAILURE 0010 16 Dbl-Word 8 ALTCPUID CPUID AND SERIAL NUMBER BEGINNING OF ALERT RECORD SPECIFIC INFORMATION 0018 24 Bitstring 76 ALTSPEC LENGTH OF SPECIFIC INFORMATION 00000064 ALTLENG (*-ALTREC) LENGTH IN BYTES OF ALTREC 0000000D ALTSIZE (*-ALTREC+7)/8 DOUBLEWORD LENGTH OF ALTREC REDEFINITIONS OF ALERT RECORD FIELDS 0008 8 Signed 4 ALTDTEN DATE OF SYSTEM FAILURE 000C 12 Signed 4 ALTTMEN TIME OF SYSTEM FAILURE 0010 16 Bitstring 1 ALTVERNO MACHINE VERSION CODE 0011 17 Bitstring 3 ALTCPSER CPU SERIAL NUMBER 0014 20 Bitstring 2 ALTCPMOD CPU MACHINE MODEL NUMBER 0016 22 Bitstring 2 ALTCPMEL MAX LENGTH OF MACHINE-DEPENDENT MACHINE CHECK EXTENDED LOGOUT AREA
 
 
  ALTREC Storage Layout Top of page
 
          
*** ALTREC - ALERT RECORDING RECORD
*
*     +------+------+------+------+------+------+------+------+
*   0 |:HTYPE|ALTSYS|:SWS0 |:SWS1 |:SWS2 |:SWS3 |:RDCNT|//////|
*     +------+------+------+------+------+------+------+------+
*   8 |                       ALTSFTOD                        |
*     +-------------------------------------------------------+
*  10 |                       ALTCPUID                        |
*     +-------------------------------------------------------+
*  18 |                                                       |
*     =                       ALTSPEC                         =
*     |                           +---------------------------+
*     |                           | 64
*     +---------------------------+
*
*** ALTREC - ALERT RECORDING RECORD
          
*** Overlay for ALTSFTOD in ALTREC
*
*     +---------------------------+---------------------------+
*   8 |         ALTDTEN           |         ALTTMEN           |
*     +---------------------------+---------------------------+
*  10
*
*** Overlay for ALTSFTOD in ALTREC
          
*** Overlay for ALTCPUID in ALTREC
*
*     +------+--------------------+-------------+-------------+
*  10 |:VERNO|     ALTCPSER       |  ALTCPMOD   |  ALTCPMEL   |
*     +------+--------------------+-------------+-------------+
*  18
*
*** Overlay for ALTCPUID in ALTREC
 
 
  ALTREC Cross Reference Top of page
 
 
Symbol         Dspl Value
-------------- ---- -----
ALTCHPVA       0004 80
ALTCPMEL       0016
ALTCPMOD       0014
ALTCPSER       0011
ALTCPUID       0010
ALTDASIM       0003 10
ALTDTEN        0008
ALTHDR         0000
ALTHTYPE       0000
ALTLENG        0018 00000064
ALTRDCNT       0006
ALTRECRD       0000 000000A3
ALTSFTOD       0008
ALTSIZE        0018 0000000D
ALTSPEC        0018
ALTSWS0        0002
ALTSWS1        0003
ALTSWS2        0004
ALTSWS3        0005
ALTSYS         0001
ALTTMEN        000C
ALTVERNO       0010
HDRHSDOS       0001 20
HDRHSLVL       0001 1F
HDRHSOS1       0001 40
HDRHSOS2       0001 80
HDRHSREL       0001 03
HDRHSSYS       0001 E0
HDRHSVM        0001 60
HDRHSVRS       0001 1C
HDRRCPHY       0006 0F
HDRRCSEQ       0006 F0
 
This information is based on z/VM 7.3.0 Last updated on 22 Jun 2022 at 15:46:37 EDT.
Copyright IBM Corporation, 1990, 2022