IJ45540: CORRECT ERROR CODE FOR UNALIGNED DIO TO 4K SECTORS

APAR status

• Closed as program error.

Error description

• When opening a file with DIO and issuing AIO I/O requests, the
  requests need to be aligned to the sector size. This is enforced
   by GPFS and an error is returned. The problem here was that an
  internal error code was returned (795), instead an error code
  that is recognized by Linux applications
  

Local fix

Problem summary

• When opening a file with DIO and issuing AIO I/O requests, the
  requests need to be aligned to the sector size. This is enforced
   by GPFS and an error is returned. The problem here was that an
  internal error code was returned (795), instead an error code
  that is recognized by Linux applications
  

Problem conclusion

• This problem is fixed in 5.1.2.10
  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:
  A valid Linux error code is returned for this case, that
  applications can handle.
  
  Work Around:
  None
  
  Problem trigger:
  Open a file for DIO and issue I/O requests through AIO.
  
  Symptom:
  Unexpected Results/Behavior
  
  Platforms affected:
  ALL Linux OS environments
  
  Functional Area affected:
  All Scale Users
  
  Customer Impact:
  Suggested
  

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