× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.



Very interesting article!

And explains why I've got one USB device (infrared reader for a Polar S625x
watch) that will NOT work when plugged into a usb hub.  It is port powered
and uses to much power.  Would have been great if Polar tech support could
have told me that.

Bob

> -----Original Message-----
> From: pctech-bounces@xxxxxxxxxxxx [mailto:pctech-bounces@xxxxxxxxxxxx] On
> Behalf Of Booth Martin
> Sent: Thursday, December 29, 2005 12:17 AM
> To: PC Technical Discussion for iSeries Users
> Subject: Re: [PCTECH] USB power?
> 
> Here is a link that discusses the choices of power:
> 
> http://tinyurl.com/9arab
> 
> David Gibbs wrote:
> > Folks:
> >
> > Anyone know why some external USB hard drive chassis need external power
> > and some don't?
> >
> > A few months ago I bought a USB 2 drive chassis for a 2.5" laptop drive.
> >  I was quite disappointed when I found out it required either two USB
> > connections or a power brick (larger than the drive itself).  I returned
> it.
> >
> > The other day I found a similar drive chassis that didn't have a power
> > plug.  It took it's power directly from the USB bus.  I picked it up
> > ($25 at compusa) and it works fine.
> >
> > So my question is ... why did the first one require extra power and the
> > second one doesn't?  They were both driving the same hard drive.
> >
> > Thanks!
> >
> > david
> >
> >
> >
> 
> --
> -----------------------------------
> Booth Martin
> http://martinvt.com
> -----------------------------------
> --
> This is the PC Technical Discussion for iSeries Users (PcTech) mailing
> list
> To post a message email: PcTech@xxxxxxxxxxxx
> To subscribe, unsubscribe, or change list options,
> visit: http://lists.midrange.com/mailman/listinfo/pctech
> or email: PcTech-request@xxxxxxxxxxxx
> Before posting, please take a moment to review the archives
> at http://archive.midrange.com/pctech.


As an Amazon Associate we earn from qualifying purchases.

This thread ...

Follow-Ups:
Replies:

Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.