根據CloneDVD官方網頁的說明中備註以下
http://www.elby.ch/en/products/clon...ual/before.html

NOTE: CloneDVD does not backup copy-protected DVDs! Many DVDs are Content Scrambling System (CSS) encoded, which is a copy-protection file system. If a DVD is CSS-encoded then the DVD reader will refuse to access the disc. Therefore CloneDVD cannot read the files and make a copy.

CloneDVD基於法律的因素，只要有CSS的保護DVD都是不可以直接複製的...
解決方法：AnyDVD