[Thinkpad] High Power USB Port

[RWM]

Methinks USB 1.1 v USB 2.0 is a bandwidth/transfer speed issue only, not 
power handling capacity.  But that is just methink'ing.



Donald MacQueen wrote:

> RWM wrote:
> 
> So my understanding is that this has nothing to do with the USV 1.1 
> versus USB 2.0, no?
> 
>> Right; I use a hydra cable that draws power from two USB and/or the 
>> DIN connector at rear of the Ultrabase.
>>
>> Rob Bell wrote:
>>  
>>
>>> One can get a dual-ended USB cable that allows the drive to draw 
>>> power from two USB ports.  Often the USB drive enclosures come with 
>>> these types of cords.
>>>
>>> Be aware that you can trash a disk if you try to run it in an 
>>> external enclosure with too little power.  I toasted a 2.5" laptop 
>>> drive this way a month or so ago.
>>>
>>> Rob
>>>
>>> RWM wrote:
>>>
>>>   
>>>
>>>> On my X22/23/24, I've had no trouble with external USB drives up to 
>>>> 40b, but the 7k 60Gb and 100Gb drives tend to require aux power.  
>>>> Could be I've just been lucky.  Also, FWIW, I do note anecdotally 
>>>> that with USB drives and other accessories like Pocket PCs that the 
>>>> rear USB ports "seem to" dish more power than the side ports.  Never 
>>>> put a meter on them, though.
>>>>
>>>> - RWM
>>>>
>>>> Bruce Markowitz wrote:
>>>>
>>>>
>>>>
>>>>     
>>>>
>>>>> The X20-24 series had low power ports, and would not run any kind 
>>>>> of an
>>>>> external drive. The X31 has high power ports, as do all the T4X 
>>>>> units I have
>>>>> seen. The RIGHT side port on the X41 is low power, the LEFT port 
>>>>> will run
>>>>> external drives. Go figure.
>>>>> ----- Original Message ----- From: "Donald MacQueen" <dmacq at erols.com>
>>>>> To: "Thinkpad list" <Thinkpad at stderr.org>
>>>>> Sent: Saturday, February 03, 2007 10:49 PM
>>>>> Subject: [Thinkpad] High Power USB Port
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>       
>>>>>
>>>>>> I was in Circuit City today looking at a Sandisk USB drive.
>>>>>>
>>>>>> The box said that it required a "High Power USB Port".
>>>>>>
>>>>>> What is that, and how do I know if my TP has one?