BBC NEWS | Technology | Hard drive speed limit is reached

Apparently it is 435 Gb/s. But that is also per head. And frankly, with 4 heads writing to 2 double sided platters each wrting at 50 GB/s I'm not worried. Remember that HD DVDs are ~25GB/layer, so if I can read/write 4 HD DVDs to disk in one second I think I'll be doing OK. Of course, Doom 8 will be a bit choppy ...