[GRLUG] External drive transfer rates

[Michael Mol]

On 10/20/07, Bob Kline <bob.kline at gmail.com> wrote:
> On 10/20/07, Bob Kline <bob.kline at gmail.com> wrote:
> > On 10/20/07, Michael Mol < mikemol at gmail.com> wrote:

[snipped]

> > > How about:
> > >
> > > mount -t ext3 -o async  /dev/X  /disk2
> >
> >
> >
> > That would seem to make sense, but the
> > man page for mount suggests that the
> > default is async.
> >
> > One can use
> >
> > mount -t ext3  -o defaults /dev/X  /disk2
> >
> > but its unclear why this is useful.  I'm
> > assuming that one doesn't need it, but
> > will try it just to be sure.
> >
> > More later.

[snipped]

>
> The async option is apparently the default,
> and has no affect on the slow transfer rates
> I'm seeing.
>
> Some have wondered whether the connection
> is somehow defaulting to a USB 1.1 mode.  But
> if so, I see no way to do anything about that.

What kind of performance do you get if you try:

dd if=/dev/X of=/dev/null bs=1M count=1000


-- 
:wq