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From: Marts on 7 Feb 2010 20:31
I have a P4 based computer which has multiple USB ports on an Asus P5 based
motherboard.

Yesterday I plugged my Seagate 1tb external drive into it. I then plugged a WD
portable HDD into it. However, Windows reported a hardware error.

I unplugged the Seagate and plugged the WD in. It read fine.

I then plugged the Seagate back in. Windows reported the hardware error again.

It seems that for some reason Windows (XP SP2) cannot have two USB based storage
devices running at the same time.

I used different USB ports during this testing, too in case they were off the
same root hub or whatever it's called.

Didn't make any difference.

Any ideas?

From: Rod Speed on 7 Feb 2010 21:26
Marts wrote:

> I have a P4 based computer which has multiple
> USB ports on an Asus P5 based motherboard.

> Yesterday I plugged my Seagate 1tb external drive into it. I then plugged
> a WD portable HDD into it. However, Windows reported a hardware error.

> I unplugged the Seagate and plugged the WD in. It read fine.

> I then plugged the Seagate back in. Windows reported the hardware error again.

> It seems that for some reason Windows (XP SP2) cannot
> have two USB based storage devices running at the same time.

Works fine here.

You sure you didnt just stuff up the cabling to a front USB port ?

What happens if you plug them both in at once to USB ports off the
motherboard at the back of the motherboard, no hubs used at all ?

> I used different USB ports during this testing, too in case
> they were off the same root hub or whatever it's called.

Thats fine, USB allows mulitiple devices.

> Didn't make any difference.

> Any ideas?

See above.


From: me here on 7 Feb 2010 22:39
Marts wrote:

> I have a P4 based computer which has multiple USB ports on an Asus P5
> based motherboard.
>
> Yesterday I plugged my Seagate 1tb external drive into it. I then
> plugged a WD portable HDD into it. However, Windows reported a
> hardware error.
>
> I unplugged the Seagate and plugged the WD in. It read fine.
>
> I then plugged the Seagate back in. Windows reported the hardware
> error again.
>
> It seems that for some reason Windows (XP SP2) cannot have two USB
> based storage devices running at the same time.
>
> I used different USB ports during this testing, too in case they were
> off the same root hub or whatever it's called.
>
> Didn't make any difference.
>
> Any ideas?

What happens when you have a thumb drive and one of the HD's at the
same time?
From: Evan on 8 Feb 2010 04:20
You need to map the drives to different letters eg. WD -->M: and SeaG -->N:


From: Gettamulla Tupya on 8 Feb 2010 07:14
On Mon, 08 Feb 2010 09:20:35 GMT, "Evan" <newsreader(a)evan.me> wrote:

> You need to map the drives to different letters eg. WD -->M: and SeaG -->N:
>

Windoze does that automagically.

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