Re: usb flashkey disk copy error

From: Barney Wolff <>
Date: Sun, 7 Sep 2003 15:48:30 -0400
On Sun, Sep 07, 2003 at 10:55:24AM -0700, John-Mark Gurney wrote:
> > 
> > Make me the third.  I have a Sony F707 camera, which I can use on
> > 4-stable and with 5-current on a Dell I5000 laptop, but not on 5-current
> > on an Asus A7M266-D with world/kernel built 9/4/03.  The bad data starts
> > at byte 4096, always.  The problem has existed for at least a month,
> Ahh, this is useful information.  What are the controller types
> of the two machines?  ohci? uhci?  I think it might be ohci, and
> it maybe a page miscalculation when dispatching the request.

Indeed, failing system has ohci, working has uhci.

> Have you looked at the corrupted data?  does it apear to be from
> some other location, like the kernel?

Can't tell offhand, but doesn't look like code - not enough zeroes.
As I recall, multiple tries produced the same bad data each time (after
umount and re-mount).
I can't do more detailed diagnosis right now, but could in a few days.

> > perhaps longer; I can't remember if it ever worked on the Asus.  But
> > the same system runs fine with usb keyboard and mouse - which proves
> > nothing as the data rate and amount are so small.  So I can't rule
> > out hardware as the problem.  In a few days I can try booting from
> > a 4.8 live cd and see if the hardware works ok.  Old-quirks had no
> > effect on the problem.
> It's been about two months since I updated USB to use bus_dma.  So
> you could try checking out the usb code from July 4th or so and see
> if it goes away (it probably will).

Will try that, again in a few days.

Barney Wolff
I'm available by contract or FT, in the NYC metro area or via the 'Net.
Received on Sun Sep 07 2003 - 10:48:33 UTC

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