[X4U] FireWire vs. USB 2.0

[Hector Luna]

some systems will have more than one bus, if you connect the different
speed devices to different busses you can keep the two speeds

On 5/26/05, Randy B. Singer <randy at macattorney.com> wrote:
> Hector Luna said:
> 
> >I don't know about purposely crippling, but I do know that USB was
> >created as replacement bus for PS/2 devices. It was meant for
> >keyboards and mice. I know that if you put a USB 1.2 device on a USB 2
> >bus, the speed drops down to USB 1.2 and I know that when given an
> >choice between USB and IEEE 1394, I will go w/ FireWire every single
> >time...
> 
> There is quite a bit of misinformation going around about USB 2.0.
> 
> A USB 1.1  device on a USB 2.0 bus can only ever run at USB 1.1 speeds.
> 
> However, if you connect a USB 1.1 device to a USB 2.0 hub connected to a
> USB 2.0 port, and other USB 2.0 devices are connected to that USB 2.0
> hub, the USB 2.0 devices will run at normal USB 2.0 speeds (less some
> overhead).  Of course the USB 1.1 device will still only run at USB 1.1
> speeds.
> 
> Things don't slow down on a USB 2.0 bus just because you add a USB 1.1
> device to the chain.  They only slow down if you use a USB 1.1 hub
> somewhere in the chain, and then only for the things attached downstream
> of the USB 1.1 hub.
> 
> 
> 
> 
> 
> Randy B. Singer
> Co-Author of: The Macintosh Bible (4th, 5th and 6th editions)
> 
> Routine OS X Maintenance and Generic Troubleshooting
> http://www.macattorney.com/ts.html
> 
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