IBM Support

VM66098: Z-THIN PROVISIONING

A fix is available

Subscribe

You can track all active APARs for this component.

APAR status

  • Closed as new function.

Error description

  • New Function: z-Thin Provisioning support
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: All users of DS8000 Extent Space Efficient   *
    *                 thin provisioned volumes.                    *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION: APPLY PTF                                    *
    ****************************************************************
    z/VM currently has no recognition of Extent Space Efficient
    capability or events related to usage of such disk space.  In
    addition, these devices can currently only be used for guest
    disks.
    

Problem conclusion

Temporary fix

Comments

  • Support has been added to enable guest and host recognition
    and exploitation of Extent Space Efficient Thin Provisioned
    volumes.  The following new features for these ESE devices
    are now available:
    
    1) Pool space events (space warning, out of space, space
       constraint relieved) are now reported to OPERATOR.
    2) The new RELSPACE command to return disk space back to
       the pool.
    3) Query command enhancements to indicate a devices ESE
       support and to check pool space usage.
    4) Unlike Track Space Efficient (TSE) devices, ESE volumes
       can contain CPOWNED and System Resident space once the
       device is fully provisioned.
    5) Flashcopy commands updated to release allocated space
       when full volume extents are withdrawn.
    6) Simulation of ESE related I/O commands for guest
       dedicated disks and full pack and 1-END minidisks.
    
    ----------------------------------------------------------------
    
    This PTF should be applied along with PTF UV99329 for the
    related DirMaint APAR VM66108.
    
    ----------------------------------------------------------------
    
    THE FOLLOWING CHANGES HAVE BEEN MADE TO THE SYSTEM REFERENCE
    LIBRARIES:
    ***START PUBLICATION CHANGE*************************************
    PUBLICATION TITLE: CP Commands and Utilities Reference
    
              RELEASE: z/VM 6.4
    
    ORDER NUMBER: SC24-6175-12
    
    -------------------------------------------
    ABSTRACT:
    Changes to commands affected by z-Thin Provisioning
    BODY:
    New CP command RELSPACE.  Updated CP commands FLASHCOPY
    ESTABLISH, FLASHCOPY WITHDRAW and QUERY DASD.
    Updated CP utility IOEXPLOR.
    
    ***END PUBLICATION CHANGE***************************************
    
    ***START PUBLICATION CHANGE*************************************
    PUBLICATION TITLE: CP Messages and Codes
    
              RELEASE: z/VM 6.4
    
    ORDER NUMBER: GC24-6177-12
    
    -------------------------------------------
    ABSTRACT:
    New messages added for response to Thin Provision Pool events
    and the new RELSPACE command
    BODY:
    New CP messages HCP6431I indicating Thin Provision Pool events
    and HCP6432I for error responses for the RELSPACE commmand.
    utility IOEXPLOR. Updated CP message HCP296E for a new
    FLASHCOPY error reason code.
    
    ***END PUBLICATION CHANGE***************************************
    
    ***START PUBLICATION CHANGE*************************************
    PUBLICATION TITLE: CP Planning and Administration
    
              RELEASE: z/VM 6.4
    
    ORDER NUMBER: SC24-6178-14
    
    -------------------------------------------
    ABSTRACT:
    Updates to section on Space-Efficient Volumes
    BODY:
    Chapter 24 section "Space-Efficient Volumes" was updated with
    additional information on the new commands for Extent
    Space Efficient volumes and to indicate previous restrictions
    on space efficient volume usage only apply to Track Space
    Efficient volumes.
    
    ***END PUBLICATION CHANGE***************************************
    

APAR Information

  • APAR number

    VM66098

  • Reported component name

    VM CP

  • Reported component ID

    568411202

  • Reported release

    640

  • Status

    CLOSED UR1

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    YesSpecatt / New Function / Xsystem

  • Submitted date

    2017-11-28

  • Closed date

    2018-03-26

  • Last modified date

    2018-12-14

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

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

    UM35295 UM35296

Modules/Macros

  • CP       DASD     ESTABLIS HCPAMR   HCPCMM   HCPCOM   HCPDDP
    HCPDUP   HCPICU   HCPIORBK HCPMD3   HCPMD5   HCPMES   HCPMESA
    HCPMESB  HCPMNO   HCPMOM   HCPMXI   HCPMXRBK HCPNFC   HCPPFC
    HCPQDB   HCPQDE   HCPRDEV  HCPRLF   HCPRLV   HCPSDV   HCPSVI
    HCPSVI$  HCPVDEV  HCPVDS   HCP296E  HCP6431I HCP6432I IOEXPLOR
    LGRIORBK LGRVDEV  MRIODDEV MRIODVON MRMTRDEV RELSPACE SDMCWOEQ
    WITHDRAW
    

Publications Referenced
SC24617512 GC24617712 SC24617814    

Fix information

  • Fixed component name

    VM CP

  • Fixed component ID

    568411202

Applicable component levels

  • RA64 PSY UM35295

       UP18/12/14 P 1802  

  • R640 PSY UM35296

       UP18/03/28 P 1802  

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



Document information

More support for: z/VM family

Software version: 640

Operating system(s): z/VM

Reference #: VM66098

Modified date: 14 December 2018