USB hubs
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Posted by on August 25, 2008, 2:16 pm
Please log in for more thread options Running XP Pro, SP2 on 1.7 gb Thinkpad T42. I have a USB 2.0 4 port hub made by Tripp-Lite. It seems to cause wierd things when I try to use it. For instance if I try to unhook my USB external drive using "Safely Remove Hardware" it may or may not work and it takes several minutes to "make up its mind" and either dosconnect or not disconnect. Without it it seems to take only a few seconds. Actual drive access seems to be fine. But I changed ports on my USB mouse and it took 5 or 6 minutes for it to come back online. It's almost instantaneous without the hub. My last hub (1.0) seemed flakey as well. Are USB hubs prone to be freaky? Should Tripp-Lite stick with tripping lites? I only have two USB ports on this laptop. Are these hubs like everything else in hardware - no clear winner? JimL -- Push ALL sources of energy! Keep our energy money AT HOME! | ||||||||||||||||||||||
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Posted by GlowingBlueMist on August 25, 2008, 4:45 pm
Please log in for more thread options I've not run into problems with the hubs themselves other than power issues. If your drive is trying to get power from the hub it may not be supplying enough power, especially if the hub is not externally powered by a transformer. The hub might be using just enough of the 5 volts from the PC to power itself that there is not enough power left to properly feed the hard drive through the USB cable. I did have one external hard drive that had an external power transformer that caused problems, not the hub itself. The stupid twits that designed it routed the 5 volts from the external power transformer to the hard drive AND back down the USB cable into the PC/hub. That caused reset and other problems until I opened the hard drive case and cut the 5 volt trace from the transformer input to the USB cable connector. | ||||||||||||||||||||||
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Posted by on August 25, 2008, 6:06 pm
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>You might try another cable between the PC and the hub.
>I've not run into problems with the hubs themselves other than power
>issues. If your drive is trying to get power from the hub it may not be >supplying enough power, especially if the hub is not externally powered >by a transformer. Thanks, but the HD is powered separately by a wall wart (through a power strip to cut it off completely). I have no data transfer problems, just unhooking the stuff from XP Pro. Which is why I don't know whether it is hardware or software. BTW, there is almost NO cable between the hub and the computer. The built-in cable is literally 3/4 inch long! Actually 1/2 inch between the hub body and the connector. JimL -- Push ALL sources of energy! Keep our energy money AT HOME! | ||||||||||||||||||||||
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Posted by Joel on August 26, 2008, 1:50 pm
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inkleput@isp.com wrote: >
> >You might try another cable between the PC and the hub.
>
> >I've not run into problems with the hubs themselves other than power
> >issues. If your drive is trying to get power from the hub it may not be > >supplying enough power, especially if the hub is not externally powered > >by a transformer. >
> Thanks, but the HD is powered separately by a wall wart (through a power > strip to cut it off completely). > > I have no data transfer problems, just unhooking the stuff from XP Pro. > Which is why I don't know whether it is hardware or software. > > BTW, there is almost NO cable between the hub and the computer. The > built-in cable is literally 3/4 inch long! Actually 1/2 inch between the > hub body and the connector. > > JimL It could be able time to retire some older USB hubs those served us daily for number of years. Or the case of the Hub may not show any damage but I couldn't imaging about the transformer, chip after years dealing with heat. I just tossed away my first USB hub after so many years running 24/7 because the AC adapter gone bad, and it seems like another one is about to follow its brother to the trash. | ||||||||||||||||||||||
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>
> I have a USB 2.0 4 port hub made by Tripp-Lite. It seems to cause wierd
> things when I try to use it. For instance if I try to unhook my USB
> external drive using "Safely Remove Hardware" it may or may not work and
> it takes several minutes to "make up its mind" and either dosconnect or
> not disconnect. Without it it seems to take only a few seconds.
>
> Actual drive access seems to be fine. But I changed ports on my USB mouse
> and it took 5 or 6 minutes for it to come back online. It's almost
> instantaneous without the hub.
>
> My last hub (1.0) seemed flakey as well. Are USB hubs prone to be freaky?
> Should Tripp-Lite stick with tripping lites?
>
> I only have two USB ports on this laptop. Are these hubs like everything
> else in hardware - no clear winner?
>
> JimL
>