Re: Mass storage failure during USB2 data transfers

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Alan Stern wrote:

> This clearly is a bug in the drive's USB interface.  Power-cycling
> the drive wouldn't fix a problem in the computer, and a problem in
> the computer wouldn't cause the drive to go bonkers like that.
>
> If you want to pursue this further, you should test various vanilla
> kernels (no Mandriva changes).  Find the most recent version that
> works and the earliest version (which should be the very next one,
> obviously) that doesn't.  From there it might be possible to identify
>  what change, if any, is responsible for the drive's bad behavior.
>
> Alan Stern

I have tested 2.6.22 which was packaged by Mandriva but is completely
stock otherwise (no patches). This kernel failed immediately. The
problem is occurring at least since 2.6.12, but I cannot install that
(or older) version because it would break my machine (udev instead of
devfs and other issues). I remember it working OK with Mandriva 2005LE
which had 2.6.11 kernel, though. Unfortunately, I do not have a free,
throw-away machine to test it on.

The enclosure contains a Prolific PL-3507 FireWire & USB to IDE
controller (http://www.prolific.com.tw/eng/Products.asp?ID=9) and a
TSB41AB2 FireWire transceiver. Short googling revealed that the Prolific
chip is quite crummy.

Regards,

Jan






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