IV93061: FILE SYSTEM DEVICE NAME HAS A PRECEEDING SLASH IN DF OUTPUT

APAR status

• Closed as program error.

Error description

• As of Spectrum Scale 4.2.1 on Linux, GPFS no longer
  creates
  the /dev/<fs_name> device for a filesystem. Applications
  that relied on the file system device under /dev to be
  present, or that relied on "/dev" to be displayed in the
  output of the mount command, must find other ways to
  obtain
  the information. As a substitute, consider the
  information
  provided by the /etc/fstab file and /proc/mounts entries.
  
  Source:
  http://www.ibm.com/support/knowledgecenter/STXKQY_4.2.1/c
  om.ibm.
  spectrum.scale.v4r21.doc/bl1xx_soc.htm
  <http://www.ibm.com/support/knowl
  edgecenter/STXKQY_4.2.1/com.ibm.spectrum.scale.v4r21.doc/
  bl1xx_soc.htm>
  
  As a side effect; the current work directory($PWD) where
  running the command mmmount or mount, if there is a file
  or directory has the same name with the GPFS file system
  name($FSNAME), then the mounted file system name in
  /proc/mounts or /etc/mtab would become ${PWD}/$FSNAME.
  
  Spectrum scale cannot entirely control mounted file
  system
  name in this situation, as this is controlled by the
  Linux
  /bin/mount command code.
  
  This APAR is to address the explicit mmmount command via
  current working directory to ensure that no prefix added
  in /etc/mtab and /proc/mounts. However, the OS mount
  command
  and automount cases will still be subject to this Linux
  mount
  command design.
  

Local fix

• Ensure your $PWD does not have any file/directory with
  the same name as the file system when running a mount.
  

Problem summary

• GPFS removes /dev/ prefix in the device name in fstab.
  Now, the system mount command looks at the CWD for any
  same name.  If exists,the full path of the CWD appends
  to the device name in /etc/mtab and /proc/mounts entries.
  

Problem conclusion

• Before invoke the OS mount command on Linux, cd to an
  empty dir.
  
  Change back to the previous dir after mount.
  
  This will not solve file systems that don't mount via
  mmmount command. This includes automount file systems.
  

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:

  IV93958

Fix information

• Fixed component name

  SPECTRUM SCALE

• Fixed component ID

  5725Q01LX

Applicable component levels

• R421 PSY

     UP