def METHOD_NAME(self, usage=True):
    from utilities.converters import convert_size
    data = {
        "type": self.type,
        "name": self.name,
        "head": "array://%s/%s" % (self.array_name, self.head),
        "capabilities": self.capabilities,
    }
    if not usage:
        return data
    try:
        status = self.array.get_arrays()[0]
        space = status["space"]
    except Exception as exc:
        print(exc)
        data["error"] = str(exc)
        return data
    data["size"] = status["capacity"] / 1024
    data["used"] = space["total_physical"] / 1024
    data["free"] = data["size"] - data["used"]
    return data