IJ50708: POTENTIAL STATE DATA IS READ,CANNOT BE REPAIRED BY THE MMCHDISK COMMAND DUE TO THE UPDATE-MISS INFO IS LOST IN THE DISK ADDRESS.

APAR status

• Closed as program error.

Error description

• In a file system with replication configured, the miss-update
  info set in the disk address could be overwritten by log
  recovery process, then lead to stale data to be read as well as
  the start disk process cannot repair such stale replicas.
  

Local fix

• No
  

Problem summary

• In a file system with replication configured, the miss-update
  info set in the disk address could be overwritten by log
  recovery process, then lead to stale data to be read as well as
  the start disk process cannot repair such stale replicas.
  

Problem conclusion

• This problem is fixed in 5.1.9.3
  To see all Spectrum Scale APARs and their respective
  Fix solutions refer to page:
  https://public.dhe.ibm.com/storage/spectrumscale/spectrum_scale_
  apars.html
  
  Benefits of the solution:
  avoid stale data being returned to user.
  
  Work Around:
  No
  
  Problem trigger:
  I/O errors happening and generating miss-update info into the
  disk address of data blocks, and then a mmfsd daemon crash could
  result in such problem.
  
  Symptom:
  replica mismatch
  
  Platforms affected:
  All Operating Systems
  
  Functional Area affected:
  Scale Users
  
  Customer Impact:
  Critical
  

Temporary fix

Comments

APAR Information

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

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

Fix information

• Fixed component name

  SPEC SCALE STD

• Fixed component ID

  5737F33AP

Applicable component levels