USB 2.0 External Drive - What Is A Reasonable Transfer Rate?
gary.jennejohn at freenet.de
Thu Jul 23 09:01:01 UTC 2009
On Thu, 23 Jul 2009 10:04:36 +0200
Hans Petter Selasky <hselasky at c2i.net> wrote:
> On Thursday 23 July 2009 04:38:35 Drew Tomlinson wrote:
> > I have a USB 2.0 external drive that's formatted as NTFS under Windows
> > XP. I've plugged it into my 8.0 BETA2 install and am copying files to a
> > local raid1z zpool with one vdev consisting of 4 drives. I'm trying to
> > move about 100 GB of assorted files and have been at it all day. The
> > USB drive contains assorted files such as mp3, CD/DVD images, zip,
> > documents, etc. I'm guessing most files range between 1 - 4 MB with
> > some as large as 4 GB.
> > Anyway, iostat shows the transfer rate at around 2 - 3 MB per second.
> > Is this all I should expect from a USB 2.0 drive? Is there anything I
> > can do to speed this up?
> Benchmark your device like this:
> dd if=/dev/daX of=/dev/null bs=65536
> It will give you the correct transferrate number.
> Maybe there are some utilities in /usr/ports that can read NTFS faster than
> the kernel NTFS driver.
You could try /usr/ports/sysutils/fusefs-ntfs.
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