FileSystemService fSS = InitialNaming.lookup(FileSystemService.NAME);
final DeviceManager dm = DeviceUtils.getDeviceManager();
VirtualDevice dev = (VirtualDevice) dm.getDevice(RAMFileSystemType.VIRTUAL_DEVICE_NAME);
fSS.unregisterFileSystem(dev);
log.info("RAMFS unmounted");
dm.unregister(dev);
log.info("RAMFS unregistered");
} catch (NameNotFoundException e) {
log.error("filsystemservice / filesystemtype not found");
} catch (DeviceNotFoundException ex) {
log.info("no ramfs present");