Am Dienstag, 5. Dezember 2006 13:11 schrieb David Relson:
> On Mon, 4 Dec 2006 20:09:05 -0800
> David Brownell wrote:
>
> > On Sunday 03 December 2006 9:36 am, David Relson wrote:
> > > On Sun, 3 Dec 2006 12:31:56 -0500 (EST)
> >
> > > By the way, I had measured throughput to the USB drive and found
> > > I could transfer a 1GB file from internal HD to the USB in 57.9
> > > seconds, which translates to 18.5 MB/sec. Would that be
> > > considered a good or bad USB 2.0 transfer rate?
> >
> > A fair number of production devices will sustain 10 MB/sec more than
> > that; but none that do 15 MB/sec more. I'd call 18.5 MB/sec so-so.
> >
> > - Dave
>
> Dave,
>
> Good info. So 28 is achievable and 33 is out of reach.
>
> Stated differently, USB 2.0 has a theoretical max of 480Mbps, which is
> 60 MB/sec, but in actual practice only about 50% of that is attainable.
That's not really fair. The protocol itself makes reservations of bandwidth
for control transfers and real time applications.
Regards
Oliver
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