Ok, I got that now :). A sound-volume tag is indeed very specific and probably too small to be useful. Then, it is also redundant since we already have the audio tag. Depending on a users vocabulary he/she will think of different tags. I don't expect that a non-techie would think of the word filesystem wherever the term disk-volume is also applicable. Therefore I think it's best to introduce the tags 'disk-volume' and 'sound-volume' and link them to 'audio' and 'filesystem'.

In point "2", do you mean that you want to remove the 'disk-volume' tag and only use 'filesystem' tag instead? (and only 'audio' instead of 'sound-volume')

I'm not quite sure if I understand your intentions correctly. I would not want to reintroduce the volume tag as you suggest under point "1" - since I expect that unexperienced users will falsely use this tag in the future. I really want to block the tag and thus force the poster to use the tag sound-volume or disk-volume instead.

@bmike I can remove the existing plural tags, but I can't create the discussions tag. ("not allowed")