[kwlug-disc] Strange poweron problem

[CrankyOldBugger]

I agree with you, William, about not powering all the ports at the same
time.  I suspect that's the issue with the 7-port hub that I'm trying to
replace here...


On Sun, 9 Oct 2016 at 02:18 B. S. <bs27975 at gmail.com> wrote:

> On 10/09/2016 01:11 AM, William Park via kwlug-disc wrote:
> > On Thu, Sep 29, 2016 at 12:01:52PM -0400, Andrew Kohlsmith (mailing
> lists account) wrote:
> >>> On Sep 29, 2016, at 11:58 AM, CrankyOldBugger <
> crankyoldbugger at gmail.com> wrote:
> >>> I've bought a couple of Anker 4 port hubs to replace that 7 port
> >>> job.  I'm kind of sad that I'll be losing the power switches on each
> >>> port but if the hub is failing then there's not much else I can do.
> >>
> >> I really like the Orico USB2 and USB3 hubs I got from Canada
> >> Computers. Haven???t taken one apart yet but they look good, some have
> >> power switches for the ports, and have decent quality power supplies
> >> and (in the case of USB3) high-current charging ports.
> >
> > +1.
> >
> > I bought Orico USB2 10-port hub, because it came with power supply (36W)
> > sufficient to power all 10 ports all occupied (25W).  Other hubs cannot
> > power all their ports at the same time, which is scam really.
>
> Check me on this ...
>
> Such means USB length is essentially infinite? IIRC, USB max. is 30',
> unless (powered) signal repeated - such as by these, daisy chained, even?
>
> Still limited to the max. bandwidth when it finally enters the computer,
> but this issue diminishes with USB 3, especially as hubs going outwards
> are also USB 3. i.e. If really far away, first hub or more could be USB
> 2, as long as accumulation of such USB 2 hubs into the first USB 3 hub
> doesn't exceed USB 3 bandwidth.
>
> [This matters as I have zoneminder set up, with USB cameras - far
> cheaper / perhaps more effective, than IP cameras). USB length becomes
> an issue. {Even a 486 handled 5 such cameras at 320 pixels, greyscale.}
> Was fostering a feral cat at the time, and needed to see when he came
> out from under the sofa so he could be socialized. Limited camera field
> of view is annoying!]
>
> And by going in to different (non-shared) ports into the computer, one
> could presumably have a star of multiple chains of USB devices in all
> direction and far longer than the 30' USB spec. As long as there's a
> wall socket to power the hubs along the way. Unless I'm misunderstanding
> something?
>
>
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