Dvd decrypter which option read or write?

do i need to iso read and write in dvd decrypter.?
before burning to clone dvd.

or just read iso

thank you

Just read (because you will be using CloneDVD to write).

Read and then write is only good for single layer DVD’s. (i.e. DVD’s with 4.37 GB or less on them) because then you will be making an exact copy with no trascoding or stripping needed (that’s what CloneDVD is for).