def map_udisks1_connection_bus(udisks1_connection_bus):
    """
    Map the value of udisks1 ConnectionBus property to the corresponding values
    in udisks2. This a lossy function as some values are no longer supported.

    Incorrect values raise LookupError
    """
    return {'ata_serial_esata': '', 'firewire': 'ieee1394', 'scsi': '',
        'sdio': 'sdio', 'usb': 'usb'}[udisks1_connection_bus]
