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PK78388: ADD DATABASE SUPPORT FOR EXTENDED ADDRESS VOLUMES ( EAV )

A fix is available

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APAR status

  • Closed as new function.

Error description

  • Add IMS Database support for Extended Address Volumes ( EAV ).
    This is support for volumes greater than 64K.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: ALL IMS V11 USERS OF FULL FUNCTION VSAM,     *
    *                 FAST PATH DATABASES AND DBRC RECON           *
    *                 DATASETS. THIS INCLUDES BOTH KSDS AND ESDS.  *
    ****************************************************************
    * PROBLEM DESCRIPTION: THIS ENHANCEMENT PROVIDES THE SUPPORT   *
    *                      FOR IMS VSAM DATASETS TO RESIDE IN THE  *
    *                      EAS (Extended Addressing Space)         *
    *                      PORTION OF AN EAV (Extended Address     *
    *                      Volume).                                *
    ****************************************************************
    * RECOMMENDATION: INSTALL CORRECTIVE SERVICE FOR APAR/PTF      *
    ****************************************************************
    KEYWORD:
      TYPE24 LOG24 EAV EAV/K
    
    THIS IS A V11 FORWARD FIT OF V10 APAR PK72530.
    TO SATISFY GROWING DASD STORAGE REQUIREMENTS, Z/OS V1R10
    SUPPORTS EXTENDED ADDRESS VOLUMES (EAV). AN EAV IS DEFINED
    TO BE ANY VOLUME THAT HAS MORE THAN 65,520 CYLINDERS.
    ONLY 3390 MODEL A DEVICES CAN BE AN EAV.
    VOLUMES THAT ARE CONFIGURED WITH 65,520 CYLINDERS OR LESS
    ARE REFERRED TO AS NON-EAVS.
    AN EAV CONSISTS OF TWO AREAS OF MANAGED SPACE. THE FIRST
    65,520 CYLINDERS OF AN EAV IS CONSIDERED THE TRACK-MANAGED
    SPACE WHERE SPACE IS MANAGED IN TRACKS AND CYLINDERS.
    THE LAST CYLINDER IN THIS MANAGED SPACE IS AT CYLINDER
    65,519. THE SPACE ABOVE 65,520 CYLINDERS IS CONSIDERED
    THE CYLINDER-MANAGED SPACE ON THE VOLUME WHERE SPACE IS
    MANAGED IN MULTICYLINDER UNITS. ON AN EAV, THE MULTICYLINDER
    UNIT IS 21 CYLINDERS.  THE FIRST CYLINDER IN THIS MANAGED
    SPACE IS AT CYLINDER ADDRESS 65,520.
    IN ADDITION, THE SPACE ON AN EAV IS DIVIDED INTO TWO FORMS
    OF DISK ADDRESSING. THE EXTENDED ADDRESSING SPACE (EAS)
    ON AN EAV REFERS TO THE CYLINDERS WHOSE ADDRESSES
    ARE EQUAL TO OR GREATER THAN 65,536. THESE CYLINDER
    ADDRESSES ARE REPRESENTED BY 28-BIT CYLINDER NUMBERS.
    THE BASE ADDRESSING SPACE ON AN EAV REFER TO THE CYLINDERS
    WHOSE ADDRESSES ARE BELOW 65,536. THESE CYLINDER ADDRESSES
    ARE REPRESENTED BY 16-BIT CYLINDER NUMBERS OR BY 28-BIT
    CYLINDER NUMBERS WHOSE HIGH ORDER 12 BITS ARE ZERO.
    NOTE THAT DISK ADDRESSING WITHIN THE BASE ADDRESSING SPACE
    IS COMPATIBLE WITH DISK ADDRESSING ON NON-EAVS.
    IN Z/OS 1.10, IBM SUPPORTS VSAM DATA SETS ALLOCATED IN THE
    EXTENDED ADDRESSING SPACE (EAS) OF AN EAV. IMS SUPPORT FOR
    VSAM DATASETS ALLOCATED IN THE EXTENDED ADDRESSING SPACE OF
    AN EAV WILL BE PROVIDED THROUGH THE SERVICE PROCESS. THIS
    INCLUDES VSAM KSDS AND ESDS DATABASES AS WELL AS THE RECON
    DATASETS.
    
    MACROS CHANGED:
    DBFADSC:  ADDED ADSCF6EA FLAG TO ADSCFLG6. THIS INDICATES
              THAT THE ADS RESIDES ON AN EAV VOLUME.
    DBFESCD:  ADDED MODULE VECTOR ENTRY FOR DFSDEAV0
    DFSDMB:   ADDED BIT DMBPFEAV TO DMBPFLG3 TO INDICATE THE
              DATASET RESIDES ON AN EAV VOLUME
    DBFMER00: ADDED CHECK FOR THE ADS IN ERROR IF IT RESIDES
              ON AN EAV VOLUME. BIT IN THE ADSC (ADSCF6EA)
              INDICATES THE ADS IS ON AN EAV VOLUME.
    MODULES CHANGED:
    DBFMPOP0: ADDED CODE TO CALL DFSDEAV0 TO SEE IF THE ADS
              RESIDES ON AN EAV VOLUME. IF IT DOES, SETS BIT
              ADSCF6EA IN ADSCFLG6.
    DBFMADR0: ADDED MODULE VCON FOR DFSDEAV0
    DFSDVSM0: CODE ADDED TO SET A BIT IN THE LOG X'24' RECORD
              TO INDICATE THAT THE DATASET IN ERROR RESIDES IN
              THE EAS PORTION OF AN EAV VOLUME. BIT 'ERLGFEAV'
              IN ERLGFLG2 IS SET FOR AN EAV VOLUME.
              BIT DMBPFEAV IN DMBPFLG3 INDICATES AN EAV VOLUME.
    DFSDOC30: ADDED CODE TO CHECK FOR AN EAV VOLUME WHEN VSAM
              DATASETS ARE OPENED. MODULE DFSDEAV0 IS CALLED
              TO CHECK THE DEVICE TYPE. IF THE DATASET IS ON
              AN EAV, SETS BIT DMBPFEAV IN DMBPFLG3.
    DSPRSV00: CODE ADDED TO THE RESERVE PROCESSING OF THE RECON
              DATASETS. AN 'OBTAIN' MACRO IS ISSUED TO DO THE
              RESERVE I/O PROCESSING TO THE VTOC. IF THE DEVICE
              IS AN EAV, A NEW KEYWORD IS ADDED TO THE OBTAIN
              MACRO TO SUPPORT NEW FORMAT 8 AND 9 DSCBS ON
              EAV VOLUMES. THIS IS AVAILABLE WITH Z/OS 1.10
              ONLY. IF Z/OS 1.10 AND HIGHER, PARM 'EADSCB=OK'
              IS ADDED TO THE OBTAIN MACRO REQUEST.
    DFSKB009: CODE ADDED TO THE LOG X'24' PROCESSING.
              THE MODULES THAT GENERATE THE X'24' LOG RECORD SET
              A FLAG WHEN THE I/O ERROR OCCURS ON AN EAV VOLUME.
              THE NORMALIZED FORM IS IN FORMAT LLLCCCCH.
              THE LLLCCCC IS A 28BIT NUMBER IN A LINEAR FORM.
              BOTH FORMATS ARE PRINTED.THE NORMALIZED VALUE
              IS PRINTED WITH LABEL 'NORMALIZED EAV CCHHR'
    DFSLOG24: CODE ADDED TO THE LOG X'24' RECORD MAPPING.
              BIT 'ERLGFEAV' HAS BEEN ADDED TO INDICATE AN
              ERROR ON AN EAV VOLUME.
    DFSDEAV0: NEW OCO MODULE. CALLED BY NON-OCO PARTS TO CHECK
              FOR AN EAV VOLUME. IT IS COMPILED WITH Z/OS 1.10
              MACROS. A 'DEVTYPE' REQUEST IS ISSUED TO GET THE
              VOLUME INFORMATION FROM THE VTOC. BITS ARE CHECKED
              FOR AN EAV VOLUME. THEY ARE 'DVACYLMG+DVAEADSCB+
              DVAIXVLD'.
              A RETURN CODE BACK TO THE CALLER IS SET TO INDICATE
              WHETHER THE VOLUME IS ON AN EAV VOLUME OR NOT.
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    PK78388

  • Reported component name

    IMS V11

  • Reported component ID

    5635A0200

  • Reported release

    100

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    YesSpecatt / New Function / Xsystem

  • Submitted date

    2009-01-09

  • Closed date

    2009-03-20

  • Last modified date

    2009-09-19

  • APAR is sysrouted FROM one or more of the following:

    PK72530

  • APAR is sysrouted TO one or more of the following:

    UK45102

Modules/Macros

  • DBFADSC  DBFESCD  DBFMADR0 DBFMER00 DBFMPOP0
    DFSDEAV0 DFSDMB   DFSDOC30 DFSDVSM0 DFSKB009 DFSLOG24 DSPRSV00
    HMK1100J
    

Fix information

  • Fixed component name

    IMS V11

  • Fixed component ID

    5635A0200

Applicable component levels

  • R100 PSY UK45102

       UP09/03/25 P F903

Fix is available

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Document Information

Modified date:
19 September 2009