IBM Support

VM66321: HTT001 1ST LEVEL ON Z15 (D/T8561) WHEN SAD TO SCSI 2ND LVL

A fix is available

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APAR status

  • Closed as program error.

Error description

  • An HTT001 abend will occur in the first level z/VM system
    when running on a Z15 or LinuxONE III machine when a second
    level guest issues a CP IPL <vdev> DUMP command to a SCSI
    device.
    This only occurs with the combination of Z15 hardware and
    a SCSI standalone dump device.  Other levels of hardware and
    ECKD standalone dump devices are not affected.
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED: Users on an IBM z15 or LinuxONE III trying   *
    *                 to use standalone dump to a SCSI device for  *
    *                 a second level z/VM system are susceptible   *
    *                 to this problem.                             *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    ****************************************************************
    * RECOMMENDATION: APPLY PTF                                    *
    ****************************************************************
    When executing a standalone dump to SCSI DASD of a second level
    z/VM guest, the z/VM host system abended. This only occurs on
    IBM Z15 or IBM LinuxOne III machines.
    

Problem conclusion

  • A loop was changed such that at the last time through, counters
    would not be updated that might go past the end of the maximum
    area size.
    

Temporary fix

  • *********
    * HIPER *
    *********
    FOR RELEASE VM/ESA CP/ESA R640 :
    PREREQ: VM66248
    CO-REQ: NONE
    IF-REQ: NONE
    FOR RELEASE VM/ESACP/ESAR710 :
    PREREQ: VM66248
    CO-REQ: NONE
    IF-REQ: NONE
    

Comments

APAR Information

  • APAR number

    VM66321

  • Reported component name

    VM CP

  • Reported component ID

    568411202

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    YesHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-09-13

  • Closed date

    2019-10-02

  • Last modified date

    2020-02-19

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

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

    UM35543 UM35544

Modules/Macros

  • HCPSDT
    

Fix information

  • Fixed component name

    VM CP

  • Fixed component ID

    568411202

Applicable component levels

  • R640 PSY UM35597

       UP20/02/19 I 1000 ¢

  • R710 PSY UM35544

       UP19/10/04 P 2001 ¢

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.

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Document Information

Modified date:
27 March 2020