Date: Fri, 26 Jan 2007 13:02:29 +0300 From: "Andrew Pantyukhin" <infofarmer@FreeBSD.org> To: "Stefan Ehmann" <shoesoft@gmx.net> Cc: freebsd-current@freebsd.org, "M. Warner Losh" <imp@bsdimp.com> Subject: Re: Interesting speed benchmarks Message-ID: <cb5206420701260202p45046999kaec34a6876141728@mail.gmail.com> In-Reply-To: <200701261052.12435.shoesoft@gmx.net> References: <20070125.192448.-432840241.imp@bsdimp.com> <200701261052.12435.shoesoft@gmx.net>
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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.
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