USB 2.0 external hard drive only 1.000MB/s transfers
ticso at cicely12.cicely.de
Mon Sep 19 07:48:53 PDT 2005
On Mon, Sep 19, 2005 at 08:17:36AM +1000, Chris Richards wrote:
> Here is the output with the different block size.
> root at 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 at freebsd.org on behalf of Hans Petter Selasky
> Sent: Sun 18/09/2005 9:05 PM
> To: freebsd-usb at 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
B.Walter BWCT http://www.bwct.de
bernd at bwct.de info at bwct.de
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