flash drives/jump drive

[Billy Pollifrone]

On 9/29/06, Ignazio Palmisano <ignazio_io at yahoo.it> wrote:
> Harold Hartley wrote:
> > I am wondering if most all the flash drives are backward compatible with
> > the USB 1.x ports even though it says its for USB 2.0 ports.
> > There are so many out there, but a friend bought me one that holds 1GB
> > and its for USB 2.0. So that is why I ask the question above.
> >
> > I know my computer has a USB 1.x ...
> >
> > Harold
> >
> >
> I tried a one gigabyte pen and a 20 gigabyte hard drive (for usb 2.0 AND
> 1.1) both on old and new ports without problems. Not definitive answer,
> but for what I know the main difference for backward compatibility is
> that 2.0 ports usually give higher power levels (the hard drive needs
> external power on some 1.1 ports, not all of them).
> HTH,
> Ignazio
>
> --
> Ignazio Palmisano
> Ph.D. Student - palmisano at di.uniba.it, ignazio_io at yahoo.it
>
> --

The power is based on the hub's spec's. Some can supply more than
others. Plugging a 2.0 device into a 1.x port will make that device
perform at 1.x speed.