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How much power is required for a SuperDrive?

I have a SuperDrive that does not draw enough power froma  pwered USB hub or from the USB port on my 30" Cinema Display or from the USB port on the back of my Time Capsule.  The ONLY thing I have that's powerful enough to power the SuperDrive is my MacBook Pro.  The problem with that for me is that my MBP has only two USB ports - one is taken up by my Cinema Display, and the other by the powered USB hub that connects (among other things) my speakers.  So if I want to watch a movie, I have to disconnect either the Cinema Display or the speakers.  Bummer.

 

So here's my question ...

 

Exactly how much power does the SuperDrive require, and is there any other hub or device that will supply that much power so I can have the SuperDrive plugged in without disconnecting either the monitor or speakers?

I would get a usb hub that can supply 2 amps at 5 volt.

A Superdrive requires 0.45a at 5vdc, well within USB range.

Thanks for that - and do you know of a powered USB hub that delivers that?

They all do, 0.5a is the minimum for a hub but practically they all deliver more if needed.

I think it requires significantly more than that, which is why his current hub and monitor usb ports are not working.

Alas, NONE of my powered USB hubs will power the SuperDrive.  Every one of them results in this error message:

 

"A USB device can't draw enough power to operate properly.  If the device came with a power cord, plug it into an electrical outlet.  Otherwise, connect the device to a USB port on your computer."

 

Again, the SuperDrive doesn't draw enough pwoer from any USB hub I own, OR the Apple Cinema Display OR the Time Capsule.  I went to the Apple Store today, and was able to get a SuperDrive to work when plugged into the newer Thunderbolt Display ... but until I buy one of those, I'm trying to figure out if there's ANY way I can power the SuperDrive from anything other than my MBP.

here ya go:

dlink hub supplies 2a current

djcastaldo wrote:

 

I think it requires significantly more than that, which is why his current hub and monitor usb ports are not working.

Please read the USB power spec, the Superdrive conforms to it and if you are going to discuss it you should be aware of it as well.

 

To Whit:

 

Power

Take your Superdrive back to the store, it is not working to specification

The superdrive is not designed to fall within the usb power spec.  Apple made it so that you could only attach it directly to certain Apple computers or certain displays that provide more power than the USB specification.

 

EDIT:  and I am sure that Apple did this because the drive looks "pretier" without an external power supply that needs to be plugged into it (and should be if the device were to fall within standard usb specification).

djcastaldo wrote:

 

The superdrive is not designed to fall within the usb power spec.  Apple made it so that you could only attach it directly to certain Apple computers or certain displays that provide more power than the USB specification.

 

EDIT:  and I am sure that Apple did this because the drive looks "pretier" without an external power supply that needs to be plugged into it (and should be if the device were to fall within standard usb specification).

Sorry, if you use USB connectors you are bound by the USB spec, instaed of posting nonsense post the links containing some attribution for what you are posting.

https://forums.macrumors.com/showthread.php?t=420281 https://www.electronista.com/articles/08/01/23/macbook.air.usb.details/

I don't mean from rumor sites, actual figures please, either from Apple or a representative testing agency (such UL) or some other. MacRumors is called that for a reason.

Ok, well it seems you think that if the OP goes out and exchanges his superdrive for a different one that his current hubs will suddenly start working.  I am simply stating that I don't think so, I think that Apple designed the drive outside of USB spec. 

 

Here is a link from Apple stating that Apple designs some USB devices that require more power than the USB spec: https://support.apple.com/kb/HT4049

最後更新：2017-09-05 19:17:24

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