> It seems that rebuilding ROMs is much faster than Scanning them, and I seem to
> get the same results with my Rebuilt or Scan/Fixed ROMs. Am I missing something
> by not using the Scanner?
>


The rebuilder is only for adding valid roms or to create sets from your current collection to another (e.g. other emu). The rebuilder only works if crc32 and size of roms match. The scanner is much more powerful for all kind of changes. Fixing sizes, checking chds, deep checksum analysis etc..etc...

So...when updating to a new version of MAME, I personally use the scanner to fix all problems and add the new sets via the rebuilder (i.e. drag&drop in the scanresults window).

Roman Scherzer
ClrMamePro