Convert case-sensitive HDD to journaled insensitive?
Most utilities don't want to deal with the hassle of making sure all the file names work when going from a case sensitive filesystem to a case-insensitive one. For that reason, you'll want to back up, wipe and then restore the files.

You'll want to have a plan for handling a collision when:


FilEa.DOC
filea.doc


Happen in the same folder since they can coexist in a case sensitive world but not the other.