[iyonix-support] Re: Dead Iyonix
- From: Dave Higton <davehigton@xxxxxxxxxxxxx>
- To: iyonix-support@xxxxxxxxxxxxx
- Date: Fri, 11 Mar 2011 20:45:53 GMT
In message <51b270ef88riscos@xxxxxxxxxxxxx>
Richard Ashbery <riscos@xxxxxxxxxxxxx> wrote:
> In article <997e45b251.GrahameParish@xxxxxxxxxxxxxx>, Grahame Parish
> <grahame.parish@xxxxxxxxxxxxxxx> wrote:
> > In message <4D7A0763.4000303@xxxxxxxxxxxx> "David J. Ruck"
> > <druck@xxxxxxxxxxxx> wrote:
>
> > > On 11/03/2011 11:09, Grahame Parish wrote:
> > >> Last night I attached a self-powered native formatted external
> > >> hard drive to a USB port and it froze the machine - this is not
> > >> usually a problem.
>
> > > It may well have been. Self powered drives can draw too much
> > > current from the Iyonix's USB ports. See if it boots up without
> > > the USB PCI card present, you wont be able to do anything without
> > > USB, but it will indicate if that is the extent of the damage.
>
> > > Cheers
>
> > Probably not the best term to use - by self-powered I mean that it
> > has its own power, not dependent on USB power.
>
> I'm still a little confused - do you mean the USB hard-drive has its own
> independent power supply or is it relying on the Iyonix to supply the
> power? If it has its own power supply I am unable to see a reason for it
> damaging the USB card but if the latter then I guess damage might have
> occurred due to the fairly high current demands made by the hard-drive.
USB devices are either self-powered or bus-powered. Bus-powered
means they get their power from the USB; self-powered means they
have their own power supply - they power themselves, most often
from a wall-wart.
Dave
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