IJ44751: REMOUNT MAY FAIL TO MOUNT SOME FILESYSTEMS IN R/W MODE APPLIES TO AIX 7300-01

APAR status

• Closed as program error.

Error description

• The remount of the filesystem to rw mode from ro mode may
  fail. If the filesystem is mounted as ro or rox mode and
  then if we try to remount the filesystem to rw mode, the
  filesystem still remains in ro mode. This happens if the
  log device has "ro" keyword in it.
  
  For Eg:
  # mount -o rox, /prodsymp
  # mount -o remount,rw, /prodsymplog
  this fails to put the filesystem in rw mode
  
  ro -> Read Only
  rw -> Read Write
  
  Remount is actively used in LKU and since remount fails,
  application may fail after LKU.
  

Local fix

• Make sure the log device does not have "ro"
  in the log device name
  
  If it the log device already has ro in the name, you can
  use below workaround to rename the
  log device. Assuming the log device name is prodlog and
  the filesystem name is /prodfs.
  We will change the log name to /dev/pradlog
  
  # chlv -n pradlog prodlog            <=== change log name
  # chfs -a logname=/dev/pradlog /prodfs   <==== Filesystem
  should use new log device
  # mount -remount /prodfs                      <==== For
  the filesystem to start using the new log name
  
  This will avoid the issue and everything will get mounted
  fine.
  

Problem summary

• If a filesystem is remounted as rw, it might remain in ro mode.
  

Problem conclusion

• modified a the string to temporarily remove the log name so it
  doesn't interfere with the search of other data.
  

Temporary fix

Comments

• 7200-05 - use AIX APAR IJ44787
  7300-01 - use AIX APAR IJ44751
  

APAR Information

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

  IJ42493

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

Fix information

• Fixed component name

  AIX V7.3

• Fixed component ID

  5765CD300

Applicable component levels