>I was wondering if anyone had looked at the immutable fileset features in 4.1.1? yes, Nils Haustein has see: https://www.ibm.com/developerworks/community/blogs/storageneers/entry/Insight_to_the_IBM_Spectrum_Scale_GPFS_Immutability_function Frank Kraemer IBM Consulting IT Specialist / Client Technical Architect Hechtsheimer Str. 2, 55131 Mainz mailto:kraemerf at de.ibm.com voice: +49171-3043699 IBM Germany