Date: Mon, 19 Sep 2005 16:48:11 +0200 From: Bernd Walter <ticso@cicely12.cicely.de> To: Chris Richards <chrisric@routemaster.net> Cc: freebsd-usb@freebsd.org Subject: Re: USB 2.0 external hard drive only 1.000MB/s transfers Message-ID: <20050919144811.GA552@cicely12.cicely.de> In-Reply-To: <0C9AA1AB019C4A44AE29659CF2BB203202F19A@gir.routemaster.net> References: <0C9AA1AB019C4A44AE29659CF2BB203202F19A@gir.routemaster.net>
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On Mon, Sep 19, 2005 at 08:17:36AM +1000, Chris Richards wrote: > Hi, > > Here is the output with the different block size. > > root@spunky2:~$ dd if=/dev/da0 of=/dev/null bs=64000 > ^C4262+0 records in > 4262+0 records out > 272768000 bytes transferred in 269.048179 secs (1013826 bytes/sec) What does usbdevs -v say? > From: owner-freebsd-usb@freebsd.org on behalf of Hans Petter Selasky > Sent: Sun 18/09/2005 9:05 PM > To: freebsd-usb@freebsd.org > Subject: Re: USB 2.0 external hard drive only 1.000MB/s transfers > > On Friday 16 September 2005 08:45, Hans Petter Selasky wrote: > > On Thursday 15 September 2005 14:01, Chris Richards wrote: > > > Hi, > > > > > > I bought a USB 2.0 external hard drive and USB 2.0 PCI card to use for > > > backups on my FreeBSD box but the drive is recognised as only being able > > > to do 1.000MB/s transfers. Obviously a USB 2.0 drive should be able to > > > transfer data a lot faster... I have checked my config and can't see any No - A high-speed drive should be able to transfer faster, but USB2.0 just means compliance with USB2.0 specs and not that it is high-speed. It is completely OK for a USB2.0 drive to be just full-speed. That said, even with a high-speed drive it finally can still be a slow one. -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de
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