IJ53561: CHECKOUT THE ELIGIBILITY OF EACH STORAGE POOL FOR THIN-PROVISIONING PRIOR TO RESERVING THE EMERGENCY SPACE.

APAR status

• Closed as program error.

Error description

• When a file system has multiple storage pools and not all of
  them are thin-provisioning enabled, the storage pool(s) that
  is(are) not thin-provisioning enabled ended up reserving the
  emergency space. This is not only unnecessary and a bug to be
  fixed.
  

Local fix

Problem summary

• When a file system has multiple storage pools and not all of
  them are thin-provisioning enabled, the storage pool(s) that
  is(are) not thin-provisioning enabled ended up reserving the
  emergency space. This is not only unnecessary and a bug to be
  fixed.
  

Problem conclusion

• This problem is fixed in 5.2.2.1
  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:
  There is no waste of the space and it won't confuses the logic
  handling the emergency space reservation/release.
  
  Work Around:
  None
  
  Problem trigger:
  Mount a file system and check 'thin inode' in the internal dump
  (mmfsadm dup all).
  
  Symptom:
  After a file system is mounted, grep 'thin inode' in the
  internal dump... it will show the following message for the
  storage pool that is not thin-provisioning
  enabled.[root@lothal-qa6-1 ~]# mmfsadm dump all | grep "thin
  inode"       0: name 'system' Valid nDisks 32 nInUse 32 id 0
  poolFlags 2 thin inode 41 nBlocks 4124       1: name 'data'
  Valid nDisks 4 nInUse 4 id 65537 poolFlags 0 thin inode 42
  nBlocks 4131  <<<<<<<       2: name 'flash' Valid nDisks 8
  nInUse 8 id 65538 poolFlags 2 thin inode 46 nBlocks 4131
  
  Platforms affected:
  Linux/AIX
  
  Functional Area affected:
  thin-provisioning
  
  Customer Impact:
  Mid 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