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

Obtain the fix for this APAR.

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 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 UM35543

     UP20/12/16 P 2001 ¢

• 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.