3.6.1 HP PolyServe Matrix Server Administration Guide (T5392-96018, August 2008)

Chapter 8: Configure Dynamic Volumes 94
The mx dynvolume create, mx dynvolume extend, and mx fs create
commands include the --reuse option, which causes the operation to
proceed even though the specified subdevice may already be in use by
another dynamic volume. The operation will destroy the volume
previously using the subdevice.