IJ35441: WHEN OFFLINE FSCK IS RUN IN REPAIR MODE (-Y) ON A FILE SYSTEM HAVING INODE SIZE LESS THAN 4K AN ASSERT IS POSSIBLE

APAR status

• Closed as program error.

Error description

• When offline fsck is run in repair mode (-y) on a file system
  having inode size less than 4K  the assert  "logAssertFailed:
  (dacIb[i] == (*DiskAddr::invalidDiskAddrP)) ||
  (dacIb[i] == (*DiskAddr::dittoDiskAddrP)) ||
  (dacIb[i] == (*DiskAddr::cdittoDiskAddrP)) ||
  (dacIb[i] == (*DiskAddr::invalidZDiskAddrP)) ||
  (dacIb[i] == (*DiskAddr::brokenZDiskAddrP)) ||
  (dacIb[i] == (*DiskAddr::brokenDiskAddrP))" is possible.
  

Local fix

• Disable the patch queue feature by running the
  below command before running offline fsck -y:
  # mmdsh -N all mmfsadm test fsck usePatchQueue 0
  

Problem summary

• When offline fsck is run in repair mode (-y) on a file system
  having inode size less than 4K  the assert  "logAssertFailed:
  (dacIb[i] == (*DiskAddr::invalidDiskAddrP)) ||
  (dacIb[i] == (*DiskAddr::dittoDiskAddrP)) ||
  (dacIb[i] == (*DiskAddr::cdittoDiskAddrP)) ||
  (dacIb[i] == (*DiskAddr::invalidZDiskAddrP)) ||
  (dacIb[i] == (*DiskAddr::brokenZDiskAddrP)) ||
  (dacIb[i] == (*DiskAddr::brokenDiskAddrP))" is possible.
  

Problem conclusion

• This problem is fixed in 5.0.5  PTF 11
  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:
  No more assert when running offline fsck -y on a file
  system having inode size less than 4K (4096 bytes).
  
  Work Around:
  Disable the patch queue feature by running the
  below command before running offline fsck -y:
  # mmdsh -N all mmfsadm test fsck usePatchQueue 0
  
  Problem trigger:
  This issue will hit if offline fsck -y is run on a file
  system having inode size less than 4K (4096 bytes).
  
  Symptom:
  Overwrite disk addresses/Node assert
  
  Platforms affected:
  ALL Operating System environments
  
  Functional Area affected:
  Offline fsck -y
  
  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