In response to my question different pepople tried to help me and some asked about the question itself. First, I am sorry because my native language is not English. Second, I was trying to write a paper for my CS file system class, and the subject was to solve an existing problem of Samba. So, I found out there might be some problems with Samba while relating UNIX semantics with DOS semantics about filenames, but I was not sure about that. However, I finished my paper and I thank you all. Fatemeh Shams