IPhone sync takes bus power from other USB devices?

My external sound card/audio interface/whatever you want to call it completely disappears from Audio/MIDI Setup when iPhone syncs. Does the phone require such an abnormally large amount of bus power that this would occur or is my situation unusual?

Thanks Lawrence; I think I'm starting to understand but have a few more questions.
So, the audio business is running through the hub (not powered, bussed through one port on the laptop) and all those devices must not exceed .5 amps or else failure occurs (in something).
The phone runs through its own port (the one I leave open for things like thumbdrives, external hard drives, etc) and also can require (up to) .5 amps of power, the maximum that port can supply.
If both ports have their limits, why is the phone causing failure in a discrete port exclusive of the phone?
I would totally understand the failure if the phone were hooked up to the hub alongside the audio interface, but it's not. That makes total sense -- the port can only supply what it was designed to supply. But why would the phone cancel other, separate, tasks if it has it's own dedicated port?

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The troubleshooting steps below can help get your iPhone to charge.
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I am not sure if you really understand the issue at hand. Possibly that you are just scanning, not reading the whole text, or simply that you just want to close a thread with your last words or derail it for whatever strange reason. So far you have been more destructive than helpful, but again this could be ignorance at best.
If you would have had the decency to read the entire thread you would have come to the conclusion that every manufacturer, I came across, has posted FAQ's to this issue but Apple. Find a short excerpt below:
SeaGate http://knowledge.seagate.com/articles/en_US/FAQ/006135en?language=en_US <http://knowledge.seagate.com/articles/en_US/FAQ/006135en?language=en_US> Playing DRM (Digital Rights Management) protected movies in Seagate Media App Information regarding remote streaming of DRM protected movies. Most forms of DRM (Digital Rights Management) will prevent playing movies on unauthorized devices or from remote storage hosted on wireless drives or NAS drives(Seagate Wireless, Seagate Wireless Plus, Seagate Central or Seagate Personal Cloud). Movies purchased from iTunes can be streamed to iOS 6 and iOS 7 devices which were authorized from remote storage (the video could be selected in Seagate Media App and would be played in a Safari browser), however in iOS 8 this has stopped working. A bug has been filed with Apple, however this functionality has not been restored. Therefore, DRM protected movies purchased on iTunes can no longer be played on devices running iOS 8.
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