I did few tests.
If im not copying files to C (the master disc partition) the speed starts at 10MB/s, and second after second increse by 0,1~0,2MB/s
And them hold on 50MB/s (tried with alot of anime ep's, so not 1 big file like in first test)
WTF?!
When im doing this (copying from disk to disk that are on same channel but master and slave) it's realy hard to do anything in firefox/chrome.