Compound Du Val 3-fold singularities form a good class of singularities in 3-fold singularity theory. I would like to know which singularities admit crepant resolutions. If I remember correctly, $cA_{n}$ admits a crepant resolution. What about $cD_{n}$- and $cE_{n}$-singularities?

I would really appreciate it if you could give me a reference or explain what is known about crepant resolution of cDV singularities.

Thank you for your help.