linux-kernel - Re: Annoying problems with lacie external hd (JMicron 0x2339?)

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Date:	Mon, 19 Oct 2009 10:39:33 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Felipe Contreras <felipe.contreras@...il.com>
cc:	Sarah Sharp <sarah.a.sharp@...ux.intel.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	<linux-usb@...r.kernel.org>
Subject: Re: Annoying problems with lacie external hd (JMicron 0x2339?)

On Mon, 19 Oct 2009, Felipe Contreras wrote:

> On Thu, Oct 8, 2009 at 11:46 PM, Felipe Contreras
> <felipe.contreras@...il.com> wrote:
> > On Tue, Oct 6, 2009 at 11:10 PM, Alan Stern <stern@...land.harvard.edu> wrote:
> >> A usbmon trace would contain more information. Â We could see the exact
> >> sequence of commands and error codes. Â I'm not sure it would help solve
> >> anything, though.
> >
> > I followed the tutorial and the resulting log is 73M long. I don't
> > know what I'm looking for, so there it is:
> > http://people.freedesktop.org/~felipec/1.mon.out
> 
> Can you take a look? Is there anything else I can provide?

Unforunately the usbmon trace isn't much help.  It shows several 
unrecovered read errors, but you already know that the disk has a bunch 
of bad sectors.

Then near the end, for no apparent reason, it shows a failure right in 
the middle of a READ command.  The computer tried to read 128 sectors;
the drive sent back 48 sectors of data and then stopped responding.  
Something in the firmware crashed; my guess is that the bridge chip 
failed.

Alan Stern

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