OA50300: TDMF BACKOUT FAILURE AFTER COMMAND REJECT FROM EMC SOFT FENCE REQUEST LEAVES VOLUMES IN INCONSISTENT STATE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• On certain EMC microcode levels TDMF's Soft Fence request
  fails. Subsequent TDMF processing fails in swap backout
  processing leaving the volume in an inconsistent state on
  participating systems.
  

Local fix

• Use the TDMF NOFENCESOURCE option
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All TDMF users who's EMC DASD                *
  *                 microcode supports the Soft Fence            *
  *                 function. This may have been added           *
  *                 during a recent ucode update. This           *
  *                 code maybe known as 'zboost'.                *
  ****************************************************************
  * PROBLEM DESCRIPTION: At the end of a migration if z/OS and   *
  *                      the CU support Soft Fence TDMF will     *
  *                      put the SRC volume into a Soft Fence    *
  *                      state.                                  *
  *                      EMC reject the Soft Fence CCW           *
  *                      when the source device is an RDF        *
  *                      device.                                 *
  *                      Due to the error TDMF will start a      *
  *                      backout process, all Agents will        *
  *                      swap back to the original SRC but       *
  *                      the Master will swap the volume.        *
  *                      This leads to the Agents using          *
  *                      the origial SRC and the Master          *
  *                      system using the new TGT.               *
  *                                                              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An integrity problem exists if the Agents and Master do not
  backout the swap, the symptoms are message GTD2458E and
  IOS000I nnnn,yy,CMD,F7,0E00,
  80000000E900000400FF001200000004E5715A9B30C50F04000040E2000000
  FAILING PARAMETER LIST DATA = 29000100800000000000000000000000
                                C5000000000000000000000000000000
                                00000000000000000000000000000000
                                0000
  

Problem conclusion

• A circumvention for this problem is to code the TDMF
  parm NOFENCESOURCE.
  It is not currently understood why a valid Soft Fence
  request is being rejected to RDF devices.
  

Temporary fix

• *********
  * HIPER *
  *********
  CODE NOFENCESOURCE IN ADVANCE OF ANY MIGRATION
  

Comments

APAR Information

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

  OA50299

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

  UA81375

Modules/Macros

•    GTDMSGN  GTDMSGV  GTDSVOL
  

Fix information

• Fixed component name

  TDMF Z/OS

• Fixed component ID

  TDMFZOS01

Applicable component levels

• R560 PSY UA81375

     UP16/04/20 P F604 Ž

Fix is available

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