I know i already have this posted but i posted it in the wrong place....
So, my PowerMac came yesterday, and I backed up my iTunes library, then (stupidly), deleted all my music off my iMac. So i go to do the back up, and it copies 70 or so songs then says "Attempting to copy to the disk "Untitled" failed. This disk could not be read from or written to".
Untitled is the name of my hard drive for now.

As you can imagine im quite flustered because thats basically all my music.......