Re: Powerbook5,7 (G4 17") and USB 2.0 disk drive
On Sun, May 27, 2007 at 08:54:46PM +0200, Mich Lanners wrote:
> Hi all,
>
> On 24 May, this message from Sven Luther echoed through cyberspace:
> > On Thu, May 24, 2007 at 01:16:24AM +0200, Wolfgang Pfeiffer wrote:
> >> On Thu, May 24 2007, at 00:27 +0200, Wolfgang Pfeiffer wrote:
> >>
> >> > I have lots of problems connecting hardware to an AluBook 5.8. For
> >> > both USB and Firewire enclosures.
> >>
> >> In order to not exaggerate: At least some USB enclosure works,
> >> provided I connect it with 2(!) connectors to the alubook, and
> >> provided I plug those in some correct order, whatever this is ...
> >
> > Well, this is the normal power limitation of the USB device, nothing
> > to be worried about.
>
> Sven is entirely right here. I don't know what the Firewire output power
> available on the Powerbook is, but it could well be lower than what you
> get on desktops.
>
> However:
>
> > An USB connected external disk powered from only
> > the USB connector *CANNOT* work.
>
> This is not true. It depends largely on the particular device. I have a
> Plextor 80G external 2.5" drive, that does work very well on only one
> USB connector lead.
Not if they work within USB specs. I know of no 2.5" disk which can be
powered by 0.5 A at 5V. and there is bound to be leaking involved in the
electronic around the disk and the USB connection too.
Friendly,
Sven Luther
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