Date: Mon, 29 Mar 2004 13:50:31 +0000
From: <[EMAIL PROTECTED]>
Subject: Re: [LIB] USB powered external HD


> 
> From: "Wouter Smith" <[EMAIL PROTECTED]>
> Subject: USB powered external HD
> 
> Hello all,

> I am looking for an external 2.5" USB harddisk. I want it to be fully
> bus-powered, do not want to use an ac-adapter or PS2-powercable. Obviously
> I'd like this thing to be able to work on my Libretto 110 as well. I'm
> using a USB2.0-pc-card.

I recycled an old 20G drive into an IBM-labeled USB interface external carrier. This 
has no external power supply; it's fed from *two* USB connectors. It works off the 
desktop OK but I don't care to try it on the (portege) laptop, which has a single USB 
slot.

The reason I'm concerned - the spec on the disk has a peak power requirement of an amp 
at five volts; the maximum from a single USB socket is half an amp. I don't want to 
blow fuses - assuming that there are any there to blow :)

Having said that - (a) I'd hope that the USB PSU is designed to shut down gracefully 
in case of overload, and (b) the case I bought only cost me a tenner (UK) from eBay, 
so if you have a disk lying around, it might be worth a try.

At your own risk, of course :)

Neil


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