On Aug 23, 10:28, Fred Cisin (XenoSoft) wrote: it. Because it will read some number of tracks, stepping inward as it does so, then have to step back to the correct track to start writing. Example: read tracks 0 to 19 (20 in total, 19 steps), step back 19 tracks, write 20 tracks (19 steps again); repeat. Total number of steps to copy n tracks is just less than 3n. If you want to read the tracks back to verify them, life is even worse, as the total is almost 5n. On the other hand, if you do it one track at a time: read a track, write that track, then step forward one track, the total number of steps to copy n tracks is n-1 steps. And still only n-1 if you verify each track as you go. -- Pete Peter Turnbull Network Manager University of York