Do you have the possibility to test this with a current kernel?
Some EHCI bugs have been fixed recently and may not have been
pulled up to your NetBSD version.

	-- Lennart

Dieter wrote:
> In the "PATA disk drive not being configured in 2.0.2" thread I wrote:
> 
> 
>>Put the PATA drive in a USB-to-PATA box.  Works okay until it gets a read
>>error (I assume), then even the simplest command to the disk takes about
>>25 minutes, and always fails.  Power cycle the USB box and the kernel hangs.
>>Great fun having to do reboot every time you get a read error.  My latest normal
>>(non-debug) kernel is working much better though.  Best guess is that
>>taking out cmdide fixed the USB, but I haven't tested that yet.
> 
> 
> Looks like it wasn't the cmdide but rather if the ehci ("hi" (480 Mbps) speed)
> is configured or not.  That makes a bit more sense.
> 
> Without ehci, the only console message I get is
> 
> 	sd16: fabricating a geometry
> 
> and dd returns right away after an i/o error.