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Subject: Re: Archos USB A-Male to A-Male against USB Law !!! Björn ?
From: SteamShip (steamship_at_sbcglobal.net)
Date: 2003-12-18


OK, I went back to the old way of testing. It is USB 2.0, I'm not a
dumbass, and Archos are still idiots who mislabeled the back of the box of
this 20 GB recorder being only 12Mbps, and I am back on the trail of the
Holy Grail searching for a high quality, shielded cable.

I just transferred a 130 MB video file to Archos in about 9 seconds (slower
drive), and from the Archos back to the PC in about 4 seconds. If I do the
math right, (8 bits x 130 Mbytes)/4 seconds = 260 Mbps which is probably a
real world transfer rate for Fast Speed USB 2.0

I also transferred a batch of 6 Video zip files averaging in size between
30-40 MB's, adding up to 227MB's to the Archos in 18 seconds, and from the
Archos back to the PC in 12 seconds. The same calculation is 100 Mbps in,
and 151 Mbps out.

One more point of clarification on USB Nomenclature, that has replaced the
1.0, 1.1, & 2.0 confusing terms:

Low Speed USB is 1.5 Mbps
Full Speed USB is 12 Mbps
High Speed USB is 480 Mbps

----- Original Message -----
From: "SteamShip" <steamship_at_sbcglobal.net>
To: <rockbox_at_cool.haxx.se>
Sent: Wednesday, December 17, 2003 7:42 PM
Subject: Re: Archos USB A-Male to A-Male against USB Law !!! Björn ?

> Now I'm more confused. Björn, on the back of these three Model 500277 20
GB
> Recorder boxes, one of which was the defective HD that I'm returning to
> Amazon, it says two things:
>
> "USB 2.0 Interface"
> "Transfer rate to computer up to 12MB/sec"
>
> All of these models have the newer flashable ROM chips. Are you saying
that
> this model definitely transfers at 486 mbps USB 2.0 rates?
>
> ----- Original Message -----
> From: "Björn Stenberg" <bjorn_at_haxx.se>
> To: <rockbox_at_cool.haxx.se>
> Sent: Wednesday, December 17, 2003 6:46 PM
> Subject: Re: Archos USB A-Male to A-Male against USB Law !!!
>
>
> > Fred Maxwell wrote:
> > > Remember that the V1 Rockbox units only run USB 1.1
> >
> > That is not correct. Only early models (Recorder 6, 10 and some 15) have
> USB 1.1. All Recorder 20 have USB 2.0.
> >
> > --
> > Björn
> >
>
>



Page was last modified "Jan 10 2012" The Rockbox Crew
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