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Date: Fri, 26 Jan 2007 13:02:29 +0300
From: "Andrew Pantyukhin" <infofarmer@FreeBSD.org>
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To: "Stefan Ehmann" <shoesoft@gmx.net>
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Cc: freebsd-current@freebsd.org, "M. Warner Losh" <imp@bsdimp.com>
Subject: Re: Interesting speed benchmarks
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On 1/26/07, Stefan Ehmann <shoesoft@gmx.net> wrote:
> On Friday 26 January 2007 03:24, M. Warner Losh wrote:
> > On a lark, I just got a combo USB/Firewire external disk drive.  I ran
> > some crude benchmarks, and I was surprised by what I found.  This is
> > on a fairly stock -current kernel.
> >
> > Firewire does around 40MB/s, while USB 2.0 maxes out at about 12MB/s.
> > This is with a simple dd command:
>
> On my i386 notebook with USB 2.0 enclosure.
> Linux: 31.5MB/s
> FreeBSD: 27.5MB/s
>
> There's still room for improvement but numbers don't seem that bad.
>
> Maybe you should try knoppix or so to verify it's not the drive's fault. Other
> than that I'd also guess it's an amd64 problem.

IIRC I got around 50Mb/s with most USB2.0 enclosures (and
drives capable of sustaining the speed) under Windows.