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MF51480 - LIC-DISK-STG-UNPRED SYNCHRONIZATION OF GEOGRAPHIC MIRRORING

PTF Cover Letter


PTF ( Program Temporary Fixes ) Cover letter


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Abstract

LIC-DISK-STG-UNPRED SYNCHRONIZATION OF GEOGRAPHIC MIRRORING


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED      PTF/FIX  LEVEL

TYPE PROGRAM  REL  NUMBER   MIN/MAX  OPTION
---- -------- ---  -------  -------  ------
TR   5770999  710  MF99001   00/00    0000



NOTICE:
-------
Application of this PTF may disable or render ineffective programs that
use system memory addresses not generated by the IBM translator,
including programs that circumvent control technology designed to limit
interactive capacity to purchased levels.  This PTF may be a prerequisite
for future PTFs.  By applying this PTF you authorize and agree to the
foregoing.

This PTF is subject to the terms of the 'IBM License Agreement for Machine
Code', the terms of which were provided in a printed document that was
delivered with the machine.

SUBJECT TO ANY WARRANTIES WHICH CAN NOT BE EXCLUDED OR EXCEPT AS EXPLICITLY
AGREED TO IN THE APPLICABLE LICENSE AGREEMENT OR AN APPLICABLE SUPPORT
AGREEMENT, IBM MAKES NO WARRANTIES OR CONDITIONS EITHER EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OR CONDITIONS OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON INFRINGEMENT,
REGARDING THE PTF.





APAR Error Description / Circumvention

-----------------------------------------------
A synchronization was being performed in a geographic mirroring
environment from Production copy to Mirror copy. Due to some
communications issues, the environment was in the cycle of
suspending the Production copy due to a NACK and then would auto
resume. During one of the attempts to auto resume, the Mirror
copy was attempting to send a response back to the Production
copy which timed out and received a NACK itself. This resulted
in the Mirror copy not being able to inform the Production copy
about the failure and the Mirror copy varied itself off (as it
should). The Mirror copy was then varied off completely and got
rid of the permanent directory. When the auto resume occurred on
the Production copy side, it detected that the prior state was
"resuming" and called a function to stop any synchronization
going on.  That function failed when executing on the Mirror
copy.

CORRECTION FOR APAR MA40031 :
-----------------------------
The function which is executed on the Mirror copy will be
corrected to not fail in this scenario.

CIRCUMVENTION FOR APAR MA40031 :
--------------------------------
None.


Activation Instructions


None.




Special Instructions


None.


Default Instructions

THIS IS A DELAYED PTF TO BE APPLIED AT IPL TIME.



Supersedes

PTF/FIX NO(S).  APAR TITLE LINE
--------------  ------------------------------------------------------------
   MF50607      LIC-SRCB6005121-UNPRED Geographic Mirroring may fail when do
   MF51062      LIC-OTHER-SRCB6005121-UNPRED FAILURE WHEN IASP IS BEING ACCE
   MF50408      LIC-SRCB6005121 when dasd error occurs during vary-off
   MF50256      LIC-DISK-STG-WAIT SYSTEM APPEARS HUNG

Summary Information

System..............................i
Models..............................
Release.............................V7R1M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA40031
Superseded by:......................View fix details for PTF MF99011
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................C1116710


System i Support

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Document Information

Modified date:
14 October 2010