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VM66579: DIAG X'0E4' RETURNS RC=407 FOR FULLPACK MINIDISK

A fix is available

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APAR status

  • Closed as program error.

Error description

  • DIAGNOSE X'0E4' subfunction 3 returns rc=407 for full-pack
    minidisks with virtual/real reserve/release.
    The problem only occurs with fullpack minidisks.  A minidisk
    defined with DEVNO does not get rc=407.
    

Local fix

  • N/A
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED: z/VM Users of Diagnose xE4 Function 3        *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION: APPLY PTF                                    *
    ****************************************************************
    Code added by VM 620 for SSI Link processing changed some of
    the internal processing for determining link conflicts.  Part
    of this change was not allowing a non-full pack link request
    if a full pack mini link is already active containing virtual
    reserve / release or working allegiance capability.
    
    Diagnose E4 Function 3 got wound up in this change because
    processing sends the request to link conflict checking as a
    1-cylinder minidisk based upon the Diag's input cylinder no.
    This causes link conflict checking to reject the request with
    RC 407 if a full pack mini already exists with vir res / rel
    or working alleg.
    
    There is an exception case.  If the real device contains an
    existing DEVNO mini, then the Diag E4 F3 request was sent to
    link conflict checking as a full pack mini request if the diag
    input cyl no. was 0.  This allows link conflict checking to
    pass the request.
    

Problem conclusion

  • Internal Link processing in HCPLNS was modified to send a Diag
    E4 F3 request to link conflict checking as a full pack mini
    request if the input cyl no. is 0 and there is no existing
    DEVNO link on the RDEV.  This causes link conflict checking to
    pass the request if there is already a fullpack mini link
    active with vir res / rel or working alleg.  This change makes
    Diag E4 Function 3 overlay requests work the same when there
    are existing FP system-attached volser links as it does for
    existing DEVNO links.
    

Temporary fix

  • FOR RELEASE VM/ESACP/ESAR710 :
    PREREQ: NONE
    CO-REQ: NONE
    IF-REQ: NONE
    FOR RELEASE VM/ESA CP/ESA R720 :
    PREREQ: NONE
    CO-REQ: NONE
    IF-REQ: NONE
    

Comments

APAR Information

  • APAR number

    VM66579

  • Reported component name

    VM CP CP

  • Reported component ID

    568411202

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2021-11-11

  • Closed date

    2022-04-29

  • Last modified date

    2023-03-31

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

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

    UM35971 UM35972

Modules/Macros

  • HCPLNS
    

Fix information

  • Fixed component name

    VM CP CP

  • Fixed component ID

    568411202

Applicable component levels

  • R710 PSY UM35971

       UP22/05/11 P 2201

  • R720 PSY UM90260

       UP23/03/31 I 1000

Fix is available

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Document Information

Modified date:
01 April 2023