vxconfig - Veritas Volume Manager configuration device
The vxconfig device is the interface through which all changes
to the volume driver state are performed in Veritas Volume Mananger (VxVM).
This device can only be opened by one process at a time.
The initial volume configuration is
downloaded into the kernel through this device.
The vxconfigd process updates the configuration through this device.
process was designed to be the sole and exclusive owner of this
device. As such, the ioctl interface between vxconfigd and the
device is considered an internal interface and is not documented