Translating a raster with subsets results in an error

When using the GDAL Translate tool to convert attached HDF5 file into GeoTiff it first complains it can't perform the task due to subsets.
When checking the option to use subsets the task finishes but can't open the file.

After inspection the 2 subsets of the input raster are translated to 2 tiff-files with extension tif1 and tif2. The numbers should be added to the filename without extension.

And is it possible to not create two files but 1 tiff-file with multiple bands?