OA40376: NEW FUNCTION - RMF SUPPORT FOR GLOBAL MIRROR COLLISIONS ON IBM SYSTEM STORAGE DS8000 SERIES.

Obtain the fix for this APAR.

APAR status

• Closed as new function.

Error description

• New function:
  RMF support for Global Mirror collisions
  on IBM System Storage DS8000 series.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:          RMF user's .                        *
  ****************************************************************
  * PROBLEM DESCRIPTION: RMF support for Global Mirror           *
  *                      collisions on IBM System Storage        *
  *                      DS8000 series.                          *
  *                                                              *
  *                      The SMF 74 subtype 5 RAID Rank/Extent   *
  *                      Pool Data Section is changed and        *
  *                      new Postprocessor Overview conditions   *
  *                      are added.                              *
  ****************************************************************
  * RECOMMENDATION: None.                                        *
  ****************************************************************
  New function APAR to report on Global
  Mirror collisions which requires enhancements
  in the Cache Activity reporting on IBM System
  Storage DS8000 series.
  
  The RMF Postprocessor is enhanced to allow
  the following Overview conditions based
  on SMF 74 subtype 5 records:
  
   CONDITION                  NAME   QUALIFIER  SOURCE&ALGORITHM
  -------------------------+--------+----------+-----------------
   Global Mirror Collisions CASGMCSF SSID(ssid) SUM(R7451GSF)
   Sidefile count           CADGMCSF DEVN(devn) R7451GSF
  -------------------------+--------+----------+-----------------
   Global Mirror Collisions CASGMCSS SSID(ssid) SUM(R7451GSS)
   Send Synchronous Count   CADGMCSS DEVN(devn) R7451GSS
  
  
  SMF RECORD CHANGES
  
  With this APAR, the SMF record level change number at offset
  51 (X33) in all RMF product sections changes to x67 for
  FMID HRM7780 and HRM7770.
  
  SMF RECORD TYPE 74 SUBTYPE 5 (CACHE ACTIVITY)
  
  RAID Rank/Extent Pool Data Section
  
  OFFSETS   NAME     LEN  FORMAT  DESCTIPTION
  
   88 x5B   R7451ZHL   4  S_float zHPF List Pre-fetch I/O
                                  Requests.
                                  Number of command chains,
                                  where the Transport Mode
                                  operation specified a
                                  non-zero Imbedded Locate
                                  Record Count
   92 x5C   R7451ZHH   4  S_float zHPF List Pre-fetch I/O
                                  Request Hits.
                                  Number of command chains,
                                  where
                                  - the Transport Mode operation
                                    specified a non-zero Imbedded
                                    Locate Record Count.
                                  - the chain was completed
                                    without requiring access to
                                    any DDM.
   96 x60   R7451GSF   4 S_float  Global Mirror Collisions
                                  sidefile count.
                                  A GMC occurs when, during the
                                  sending of data in the
                                  secondary to create a
                                  consistency group, a
                                  subsequent host update is
                                  attempted before the modified
                                  track has been transmitted to
                                  the secondary volume. The
                                  modified track will be moved
                                  to the sidefile before
                                  allowing a new host write.
                                  The counter will be
                                  incremented by one when a
                                  track is added to the
                                  sidefile.
  100 x64   R7451GSS   4 S_float  Global Mirror Collisions
                                  synchronous count.
                                  When a write collision occurs,
                                  the modified track data which
                                  belongs to the current
                                  consistency group may be sent
                                  to the remote
                                  control unit before allowing
                                  the write. The data may come
                                  from the sidefile if out is
                                  full or from cache if the
                                  collision sidefile
                                  is not being utilized
   104  x68  *        32  CHAR    Reserved
  

Problem conclusion

Temporary fix

Comments

• See Problem Summary.
  

APAR Information

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

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

  OA40647 UA70607 UA70608

Modules/Macros

• ERBAPPL  ERBCRBWS ERBCRSRS ERBCRSSS ERBDUCAC
  ERBEXCAC ERBEXCIT ERBEXCKP ERBFLCNV ERBMFASR ERBMFBSR ERBMFDCR
  ERBMFDCX ERBMFIZS ERBMFLZV ERBMFPDU ERBMFPER ERBMFPIR ERBMFRCA
  ERBMFRCC ERBMFRCM ERBMFRCO ERBMFRCS ERBMFRC1 ERBMFRGM ERBMFRSS
  ERBMFXCB ERBPCTBL ERBPPASS ERBPPCOM ERBPPCON ERBRMFPP ERBR745
  ERBSMFI  ERB3GCTC ERB3GDAC ERB3GSIL ERB3GSMF ERB3RCAD ERB3RCAS
  ERB3ROCA ERB3RTBR ERB3XEQS
  

Fix information

• Fixed component name

  RMF

• Fixed component ID

  566527404

Applicable component levels

• R770 PSY UA70607

     UP13/09/14 P F309

• R780 PSY UA70608

     UP13/09/14 P F309

Fix is available

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