Invokes the Disk File Optimizer. This utility is a layered
product that restores file contiguity while the target volume
remains on line and accessible. The Disk File Optimizer
is compatible with any Files-11 structure levels 2 or 5
(ODS-2, ODS-5) formatted volume including single volumes,
bound volume sets, stripe sets or shadow sets.
Format
DEFRAGMENT [ /INTERFACE ]