Re: USB2 and thumb drives limit?

[Casey Boone <caseyboone@gmail.com>]

most likely it is a power issue as you said.  i have a similar product
from ads and ran into a similar situation.  mine did come with a power
adapter however, but it would seem that i have lost it somewhere along
the way (but what i was using it for i now use an external usb2 4 port
hub for instead)

Casey


On Mon, 14 Feb 2005 21:30:09 -0600, Robert G. (Doc) Savage
<dsavage@peaknet.net> wrote:
> I have a two-port USB2 CardBus adapter that allows my thumb drives to
> run at full 480 Mbps speeds. But it seems I can only use one at a time,
> and it doesn't matter which one. If I insert the second, I lose access
> to both.
> 
> Is this a limitation of USB2 hubs in general, or possibly a power-
> related limitation specific to this hub (it's an ADS Tech USBX-2001)?
> The card has a power port for an external power supply, but one wasn't
> included because it's supposed to draw any power it needs from the
> CardBus interface.
> 
> Has anyone else had any problems connecting two thumb drives to the same
> USB2 hub? I can connect one thumb drive to my ThinkPad's built-in USB1.1
> port and the other to the ADS Tech USB2.0 adapter, and can access both
> with no problems (other than extreme slowness on the built-in port).
> 
> -- Doc
> Robert G. (Doc) Savage, BSE(EE), CISSP, RHCE | Fairview Heights, IL
> Fedora Core 3 kernel 2.6.9-1.681_FC3 on a P-III/M IBM Thinkpad A22p
> "Perfection is the enemy of good enough."
>                          -- Admiral of the Fleet Sergei G. Gorshkov
> 
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