IJ55141: FALSE POSITIVE REPLICA MISMATCH ON BLOCK 0 OF SNAPSHOT INODE0 FILE

APAR status

• Closed as program error.

Error description

• If replica compare is done on block 0 of a snapshot inode0 file
  while the same block is being updated, a false positive replica
  mismatch can happen.
  

Local fix

Problem summary

• If replica compare is done on block 0 of a snapshot inode0 file
  while the same block is being updated, a false positive replica
  mismatch can happen.
  

Problem conclusion

• This problem is fixed in 5.2.3.1
  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:
  Fixed the false positive replica mismatch issue.
  
  Work Around:
  None
  
  Problem trigger:
  Doing replica compare and updating snapshot inode0 file at the
  same time
  
  Symptom:
  Replica mismatch is reported for block 0 of snapshot inode0 file
  
  
  Platforms affected:
  All platforms
  
  Functional Area affected:
  core GPFS
  
  Customer Impact:
  High Importance
  

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