two usb 2.0 drives cannot work together

[alexander.kuzmin]

Hi,

I've been experiencing the problem for a long time. The symptoms are
the following:

- I plug in my USB2.0 HDD, everything works ok
- I plug in my card reader with a card, it work ok, but usb HDD stops
working. It looks like it is still present, but I cannot browse any
directories except for those that have been opened when the HDD was
working (probably cached). After some time, windows begins to report
errors like "Delayed write on <hdd_letter> failed, yaddah yaddah". The
card reader works without any problems.
- I plug out the card drive and hdd, plug in hdd again, hdd works

I noticed the same behaviour with my USB TV card. Joystick does not
cause this issue.

I have service pack 2 installed, generally the latest updates as well.
I tried to install usb2.0 driver from my motherboard cd, but it did not
solve the problem.

If you have any idea how to deal with this issue, I'll be very happy.

Thanks,

 

[alexander.kuzmin]

Hi,

I've been experiencing the problem for a long time. The symptoms are
the following:

- I plug in my USB2.0 HDD, everything works ok
- I plug in my card reader with a card, it work ok, but usb HDD stops
working. It looks like it is still present, but I cannot browse any
directories except for those that have been opened when the HDD was
working (probably cached). After some time, windows begins to report
errors like "Delayed write on <hdd_letter> failed, yaddah yaddah". The
card reader works without any problems.
- I plug out the card drive and hdd, plug in hdd again, hdd works

When I leave my card reader plugged in and plug the usb hdd in, Windows
cannot recognize the HDD.

 

[Yves Leclerc]

When I leave my card reader plugged in and plug the usb hdd in, Windows
cannot recognize the HDD.

This problem sound like the on-board motherboard USB ports can not provide
enough power over the USB ports to power all the drives and memory reader.

What is the output power rating for the power supply in this PC?

Also, have you considered trying a powered USB hub? These powered addition
power to USB device, with their own power supplies.