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MF69049 - OSP-OTHER THE LARGE NUMBER OF PATHS (8) PER HYPERSWAP PRIMAR

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Abstract

OSP-OTHER THE LARGE NUMBER OF PATHS (8) PER HYPERSWAP PRIMAR


Pre/Co-Requisite PTF / Fix List

REQ  LICENSED           PTF/FIX  LEVEL

TYPE PROGRAM  RELEASE   NUMBER   MIN/MAX  OPTION
---- -------- --------- -------  -------  ------
TR   5770999  V7R2M0    MF99109   00/00    0000



NOTICE:
-------
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APAR Error Description / Circumvention

-----------------------------------------------
When more than one target port is defined in a zone and we move
from one to another, the port ID changes in inquiry message from
the DS8000, causing an unexpected miscompare in our hyperswap
code. FIX is required to allow more than one in a zone.

CORRECTION FOR APAR MA49108 :
-----------------------------
The comparison in the code no longer includes the target port.
We still recommend only one target port per zone but this fix
will avoid a failure even if a zone is mis-configured to include
two or more target ports.

CIRCUMVENTION FOR APAR MA49108 :
--------------------------------
None.


DESCRIPTION OF PROBLEM FIXED FOR APAR MA48919 :
-----------------------------------------------
The large number of paths (8) per hyperswap primary and
secondary led to hitting a resource timing window in the code.

CORRECTION FOR APAR MA48919 :
-----------------------------
A code change was made to avoid running out of resource when the
path count is high.

CIRCUMVENTION FOR APAR MA48919 :
--------------------------------
None.


DESCRIPTION OF PROBLEM FIXED FOR APAR MA49199 :
-----------------------------------------------
Timing window in path enlistment can cause paths to become
unresponsive (marked deviceGone)

CORRECTION FOR APAR MA49199 :
-----------------------------
Removed timing window.

CIRCUMVENTION FOR APAR MA49199 :
--------------------------------
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
--------------  ------------------------------------------------------------
   MF68545      LIC-DISK-STG-SRCB6008003-UNPRED CPPEA35 OR B6008003 IS ISSUE
   MF67976      LIC-DISK-OTHER-INCORROUT-DISK-D/T2145 IASP disk unit is miss
   MF66524      LIC-DISK-OTHER-SRCXXXX9092-UNPRED REPLACEMENT DISK IS NOT AV
   MF66475      LIC-DISK-OTHER-UNPRED HyperSwap secondary migration failure
   MF66149      LIC-DISK-OTHER-UNPRED Hyperswap with Lun Switch recovery sup
   MF66087      LIC-INCORROUT-DISK-D/T2145 UNNECESSARY SRC21453100 IN PAL
   MF65667      LIC-DISK-OTHER-UNPRED SYSTEM NOT USING PREFERRED ACCESS PATH
   MF65477      LIC-DISK-STG-INCORROUT-DISK RACE CONDITION MAY CAUSE MISSING
   MF65450      INCORROUT-DISK-HLIC-94XXDISK UNEXPECTED NUMBER OF PASSIVE PA
   MF65296      LIC-DISK-INCORROUT DASD Initialization fails on Linux virtua

Summary Information

System..............................i
Models..............................
Release.............................V7R2M0
Licensed Program...............5770999
APAR Fixed..........................View details for APAR MA49108
View details for APAR MA48919
View details for APAR MA49199
Superseded by:......................
Recompile...........................N
Library.............................QSYS
MRI Feature ........................NONE
Cum Level...........................NONE


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Document Information

Modified date:
07 December 2021