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From: Stefan Ehmann <shoesoft@gmx.net>
To: Gary Jennejohn <garyj@jennejohn.org>
Date: Fri, 26 Jan 2007 16:27:20 +0100
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Cc: freebsd-current@freebsd.org, Alexey Karagodov <karagodov@gmail.com>
Subject: Re: Interesting speed benchmarks
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On Friday 26 January 2007 15:06, Gary Jennejohn wrote:
> Stefan Ehmann writes:
> > On Friday 26 January 2007 13:35, Andrew Pantyukhin wrote:
> > > On 1/26/07, Stefan Ehmann <shoesoft@gmx.net> wrote:
> > > > On Friday 26 January 2007 11:00, Alexey Karagodov wrote:
> > > > > what manufacturer says about usb speeds?
> > > > > that is the question
> > > >
> > > > Well, "up to 56MB/s" which is pretty much full USB2 speed.
> > > >
> > > > But writing it on the box doesn't mean the speed can actually be
> > > > reached.
> > > >
> > > > Benchmarking on windows might be interesting, but I don't know how to
> > > > measure raw disk io on windows.
> > >
> > > Format the disk, copy a large file to/from it, divide
> > > its size by time spent, add the word "approximately" :-)
> >
> > I'd rather not format a drive with my backups and other stuff on it :-)
>
> If you want to test under windows then you could use hdbench from c't
> magazine. I think it has a non-destructive mode. It's what they use to
> do all their disk tests.

Thanks for the tip. Using h2benchw, I get 30.5MB/s - so no magic speed 
increase on windows. The limiting factor is not the hd, using ata I get more 
than 65MB/s.

According to [1] "The maximum rate currently (2006) attained with real devices 
is about [...] 30 MB/s".

[1] http://en.wikipedia.org/wiki/Usb