@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (!super.equals(obj))
			return false;
		if (getClass() != obj.getClass())
			return false;
		UsbBlockDevice other = (UsbBlockDevice) obj;
		if (m_deviceNode == null) {
			if (other.m_deviceNode != null)
				return false;
		} else if (!m_deviceNode.equals(other.m_deviceNode))
			return false;
		return true;
	}