for dev in ud_manager.EnumerateDevices():
    device_obj = bus.get_object('org.freedesktop.UDisks', dev)
device_props = dbus.Interface(device_obj, dbus.PROPERTIES_IFACE)
print(device_props.Get('org.freedesktop.UDisks.Device', 'DriveVendor'))
print(device_props.Get('org.freedesktop.UDisks.Device', 'DeviceMountPaths'))
print(device_props.Get('org.freedesktop.UDisks.Device', 'DriveSerial'))
print(device_props.Get('org.freedesktop.UDisks.Device', 'PartitionSize'))
python udisks - enumerating device information