From: Fred Maxwell <rockbox_at_anti-spam.org>
Date: Wed, 17 Dec 2003 15:03:04 -0500

Steamship,

Don't feel like a dumbass. The USB device manufacturers intended to confuse
you. Once people were used to USB 1.1 meaning 12mbps max speed and USB 2.0
meaning 480mbps max speed, they changed the nomenclature to "USB 2.0 Full
Speed" and "USB 2.0 High Speed" with "Full Speed" meaning 12mbps rather than
what consumers had been lead to believe about USB 2.0.

I'd be very interested to see if you could measure any difference in speed
or errors when using a high-quality cable vs. a low-quality one. I don't
know if you will and haven't seen any studies, but let me know if you find
something. I think that it would be of interest to lots of users in the
Rockbox forum with the Archos 2.0 USB devices who are transferring both
firmware and music over the link.

Regards,
  Fred Maxwell

> -----Original Message-----
> From: owner-rockbox_at_cool.haxx.se [mailto:owner-rockbox_at_cool.haxx.se] On
> Behalf Of SteamShip
> Sent: Wednesday, December 17, 2003 2:27 PM
> To: rockbox_at_cool.haxx.se
> Subject: Re: Archos USB A-Male to A-Male against USB Law !!! Fred ruined
> my day! LOL
>
> LOL! Fred, you ruined my day! I now feel like such a complete dumbass.
> I
> assumed by reading the Archos feature promotion on the orange side of the
> box which reads "Fast USB 2.0 Plug & Play connection" that it did
> transfer
> at 480 mbps. Now that I read the smaller print on the back, I see that it
> does actually say the 12mbps rate. I'm really beginning to despise
> Archos.
>
> Irrespective of my misunderstanding, and Archos misleading advertising, I
> also was trying to find high quality, well shielded, gold plated
> connectors
> for USB. This is much more critical for True High Speed USB 2.0 480mbps
> transfers, like I use for my external Maxtor 250GB USB 2.0 HD (uses A to
> B)
> Now this Archos cable pursuit has become mute.
>
>
> ----- Original Message -----
> From: "Fred Maxwell" <rockbox_at_anti-spam.org>
> To: <rockbox_at_cool.haxx.se>
> Sent: Wednesday, December 17, 2003 1:15 PM
> Subject: RE: Archos USB A-Male to A-Male against USB Law !!!
>
>
> > Steamship wrote:
> >
> > > When you do technical research on various USB, IDE, SATA, Parallel,
> SCSI
> > > cables and how much difference there is in actual measured
> performance,
> > > and shielding from other electromagnetic sources, you will know why I
> am
> > > looking for quality. I still have not found any, despite the better
> > > search term that Björn gave me.
> >
> > Remember that the V1 Rockbox units only run USB 1.1, so it's only 1/40th
> the
> > speed of USB 2.0 (assuming theoretical maximums of 12mbps and 480mbps).
> >
> > Are you getting errors or speed problems when transferring to your
> Rockboxed
> > Archos using the stock cable? Is it causing or being affected by some
> kind
> > of interference? I'd love to help, but help me by letting me know what
> > problem you're trying to solve.
> >
> > Regards,
> > Fred Maxwell
> >
> >
> >
>
Received on 2003-12-17