IJ29163: TRUNCATE AN IMMUTABLE MIGRATED FILE CAUSES DATA LOSS

APAR status

• Closed as program error.

Error description

• When overwrite or truncate a migrated file with
  immutable flag, Spectrum Scale will post a TRUNCATE
  DMAPI event so DM application(TSM, LTFSEE) will truncate
  the migrated file data from the tape, and this causes
  data loss. This is wrong because Spectrum Scale shouldn't
  send out the TRUNCATE DMAPI event if this file is
  immutable.
  
  Reported In:
  Spectrum Scale 5.0.5.1
  
  Known Impact:
  
  file data loss
  
  
  How can a customer avoid this problem?
  
  Avoid overwrite/truncate an immutable file which has
  been migrated.
  

Local fix

Problem summary

• When truncating a migrated immutable file with DMAPI interfaces,
  the data of the file becomes zero, although the file is
  immutable.
  

Problem conclusion

• Benefits of the solution:
  Avoid data loss and modification to the immutable files.
  
  Work around:
  No
  
  Problem trigger:
  Truncate operation against migrated immutable file.
  
  Symptom:
  data of the file becomes zero
  
  Platforms affected:
  All Operating Systems
  
  Functional Area affected:
  immutable and append-only files.
  
  Customer Impact:
  Critical
  

Temporary fix

Comments

APAR Information

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

  IJ28681

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

  IJ29682

Fix information

• Fixed component name

  SPEC SCALE STD

• Fixed component ID

  5737F33AP

Applicable component levels