On Apr 14, 4:34 pm, JF Mezei <jfmezei.spam... at vaxination.ca> wrote: > Does this mean that VMS engineering only went as far as providing the > file system tools for on-line defragmenters but never actually > productised a degragmenter that used those services ? > No. Look into HP Disk File Optimizer (DFO) for OpenVMS. http://h71000.www7.hp.com/doc/dfo.html