IJ49580: IO ERR 'NO SUCH DEVICE OR ADDRESS' IF A NSD IS REMOVED LOCALLY

APAR status

• Closed as program error.

Error description

• ABSTRACT:
  IO err "No such device or address" if a NSD is removed
  locally
  
  Error Description:
  
  GPFS will use a NSD locally if it find a local path to
  that NSD disk.
  But GPFS will return "No such device or address" for IO
  operations after a NSD
  disk is unattached/removed from that node, whatever that
  node is a NSD server
  for that NSD disk or not.
  
  Reported in:
  All Storage scale versions.
  
  Known Impact:
  "No such device or address" errors for IO to a NSD if it
  is removed/unattached from that
  node even if that NSD has NSD server defined.
  
  Verification steps:
  Checked if the I/O from GPFS node will return "No such
  device or address"(err 6)
  if the local path to an NSD disappeared from that node.
  
  Recovery action:
  Restart GPFS on that node.
  
  Local Fix:
  No
  

Local fix

Problem summary

• When the device file for a NSD disk got offline or unattached
  from a node, the I/O issued from that node
  would fail with "No such device or address" error (6), even
  there are other NSD servers defined and
  available for servicing I/O request.
  

Problem conclusion

• Ensure the I/O operations can be done from a node even its local
   disk device file got offline or unattached from it,
  when there are other NSD servers defined and available for
  service.
  
  This problem is fixed in 5.1.9.2
  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:
  Ensure the I/O operations can be done from a node even its local
  disk device file got offline or unattached from it, when there
  are other NSD servers defined and available for service.
  
  Work around:
  reboot the node.
  
  Problem trigger:
  The disk device got offline or unattached
  from a node.
  
  Symptom:
  I/O error
  
  Platforms affected:
  All Operating Systems
  
  Functional Area affected:
  All Scale Users
  
  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