2008/11/27, Herbert Graf : > > On Thu, 2008-11-27 at 01:37 +0100, Ariel Rocholl wrote: > > >One of the first target application for USB 3 is mass storage. The speed > > of USB mass storage device will be greatly increased by USB 3 Super > Speed. > > > > Why? Perdon my ignorance but, if current limitation is HD speed (not USB2 > > speed) how a mass storage application can increase speed (I mean in > > practice, not in comercial-greatest-and-latest-news-vendor-approach). > > Well it won't increase single disk performance that much, it will have a > measurable effect on accesses that come out of cache though. That said I > agree, USB3 won't make most mass storage devices that much faster. > > > Wouldn't it be better to make USB2 more robust rather than diverge > attention > > into new spec? > > Sorry, but I simply don't agree with you here. USB2 works REALLY well. > Most of the issues I've had were either with substandard hardware (which > was never certified) or faulty OS stacks. The USB2 standard itself is > not to blame. Well, we don't have to agree anyway. I'm fine with you having good experiences using USB2 altogether. That doesn't mean USB2 is as good as it should be. There is no need to go to substandard hardware or drivers, as Dell or HP or Sandisk can be considered standard hardware by all means. > > Little to do with real engineering IMHO, this is all about comercial > > interest. > > Umm, of course it's commercial interest. Do you think we are engineering > things just for the fun of it?? Money is the motivator in our world, so > yes, sometimes non "perfect" solutions get deployed when they could > still have been improved on, there's nothing new there. Should we stick > at 54Mbps until all the issues have been 100% resolved? We might have to > wait a few centuries then... > > Sorry, but welcome to the real world. There many different real worlds. And very different markets, not all them need more speed, some of them need more robustness. That may include a way that a industry standard such as USB guarantees at larger extent than today that whoever and whichever implements it does in a way that works reliably with others. That includes OS drivers going at max speed of course. My point is, from an engineering perspective, I see more important to get a USB2.1 that fixes some of the USB2 problems (I know you don't need any fix, but perhaps some others do), then build USB3 based on that experience. -- > Ariel Rocholl > Madrid, Spain -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist