OA62651: MISSING SYNCHRONOUS I/O SECTION 1 RECORDS FROM SMF42 SUBTYPES 5 & 6

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• When SYNCIO Read or Write processing has been requested by an
  application but cannot be used due to a customer correctable
  reason (ex. zHPF is disabled), the number of such requests are
  accumulated and reported by Media Manager in the
  Synchronous I/O Sections 2 and 3 of SMF 42 records (subtypes 5
  and 6) while the request is satisfied by MM using
  non-SYNCIO processingie. asynchronous I/O).
  
  However, based on the MM non-SYNCIO processing performed, it is
  possible that the number of attempted SYNCIO requests (S42SNRDT,
  S42SNWTT) will not be recorded in Synchronous I/O Section 1
  (which is shared between subtype 5 and 6 SMF 42 records). This
  can result in the Synchronous I/O Section 1 portion of the SMF
  42 record to be empty.
  
  MMKEYS:  MM2021 MMZHL MMSMF42
  

Local fix

• BYPASS/CIRCUMVENTION:
  None
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of SMF Records Type 42 Subtype 5 and  6 with           *
  * zHyperLink enabled on D/T2107 storage  subsystems.           *
  *                                                              *
  *                                                              *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * SyncIO errors detected by Media Manager are reported in SMF  *
  * Record Type 42, subtype 5 and 6 SyncIO Sections 2 and 3,     *
  * but not SyncIO Section 1. This occurred when a SyncIO error  *
  * was detected by Media Manager and the SyncIO Exit was not    *
  * called.                                                      *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  

Problem conclusion

• The driver layer software now passes information to the device
  layer indicating a SyncIO error was detected.  SyncIO Section 1
  now contains the SyncIO Attempts recorded in Section 2 and 3.
  

Temporary fix

Comments

APAR Information

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

  OA61737

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

  UJ08972 UJ08973 UJ08974

Modules/Macros

• IECDSTAT
  

Fix information

• Fixed component name

  DEVICE SUPPORT

• Fixed component ID

  5695DF111

Applicable component levels

• R250 PSY UJ08974

     UP22/08/31 P F208

• R240 PSY UJ08973

     UP22/08/31 P F208

• R230 PSY UJ08972

     UP22/08/31 P F208

Fix is available

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