[plug] 2.5 USB Enclosure

[Chris Caston]

On Sat, 2005-08-06 at 11:47, Daniel Pearson wrote:
> Time to get a new power supply :P
> 

They ended up with a TR2-430W (and they complained heavily about the
price despite the fact I only made about $8 markup) but I didn't bring
out a usb pci card so I got an angry phone call they tried to use the
hub again and XP said something along the lines "There is not enough
power to run this device"

I told them never to use the hub again.

regards,

Chris
> Chris Caston wrote:
> 
> >On Sat, 2005-08-06 at 01:31, Craig Ringer wrote:
> >  
> >
> >>On Fri, 2005-08-05 at 21:32 +0800, Chris Caston wrote:
> >>
> >>    
> >>
> >>>OK I had trouble with 10gb drives but not with 40gb and above.
> >>>      
> >>>
> >>It's entirely possible that the issues you encountered were to do with
> >>power draw. Did you check the power requirements of the drives? IIRC USB
> >>guarantees 500 milliamps (certainly < 1 amp) at 5V. Some host controller
> >>implementations provide a *LOT* more than that when required, some stick
> >>close to the standard. Laptops seem to be stricter about max power draw,
> >>especially Intel-chipset laptops.
> >>
> >>I've also found that all other things being equal, newer hardware tends
> >>to be willing to supply more power. In particular, lots of manufacturers
> >>seem to support much greater draws in USB2 chipsets, even though the
> >>standard didn't increase the max permitted power draw for USB2 (AFAIK).
> >>
> >>--
> >>Craig Ringer
> >>    
> >>
> >
> >I had a customer with a USB hub that would suck most of the power out of
> >the machine sometimes killing the PSU other times making it unable to
> >start.
> >
> >
> >  
> >
> >>_______________________________________________
> >>PLUG discussion list: plug at plug.org.au
> >>http://www.plug.org.au/mailman/listinfo/plug
> >>Committee e-mail: committee at plug.linux.org.au
> >>
> >>    
> >>
> >
> >_______________________________________________
> >PLUG discussion list: plug at plug.org.au
> >http://www.plug.org.au/mailman/listinfo/plug
> >Committee e-mail: committee at plug.linux.org.au
> >
> >
> >
> >  
> >