IV05055: DISK OPEN ROUTINE RETURNS EIO INSTEAD OF CORRECT ERROR VALUE APPLIES TO AIX 7100-01

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• An attempt to open a write-protected disk for read/write
  access should return errno 47 (EWRPROTECT).  Instead,
  open attempts are failing with errno 05 (EIO).  This may
  cause some third party multipathing products to
  improperly
  fail the paths on write-protected disks.
  
  Other nonzero error codes may ALSO inadvertently be
  changed to EIO rather than the actual error values, thus
  causing applications which base their logic on specific
  error values to exhibit unexpected behavior.
  

Local fix

• Workaround:  In the case where the problem occurs on
  write-protected disks, (errno 47) temporarily place
  write-protected disks in a "Defined" state:
  .
  rmdev -l hdisk#    (for each write-protected disk)
  .
  Once disks are ready for read/write access, a simple
  cfgmgr will make them Available again.
  .
  There is no known workaround for other nonzero error
  values.
  

Problem summary

• Disk open routines provide a blanket error value of EIO for
  all error conditions and does not point to the actual error.
  

Problem conclusion

• Code in disk open routine fixed so that proper error value is
  returned.
  

Temporary fix

Comments

APAR Information

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

  IV03362

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

Fix information

• Fixed component name

  AIX V7.1

• Fixed component ID

  5765H4000

Applicable component levels

• R710 PSY U838098

     UP11/10/05 I 1000

PTF to Fileset Mapping

• U838098 devices.fcp.disk.rte 7.1.1.0