def METHOD_NAME(postfix: str) -> float:
    try:
        # ramdisk value is in watt-seconds for historic reasons -> / 3600
        return ramdisk_read_float(prefix + postfix) / 3600
    except (FileNotFoundError, RamdiskReadError) as e:
        log.warning("Read from ramdisk failed: %s. Attempting restore from broker", e)
    return restore_value(prefix, postfix)