USB fash devices and dd

Gordon Tetlow gordon at freebsd.org
Wed May 5 18:20:34 PDT 2004


On Wed, May 05, 2004 at 09:15:17AM -0700, Gordon Tetlow wrote:
> On Tue, May 04, 2004 at 12:04:26PM +0200, Soeren Straarup wrote:
> > 
> > Hi
> > 
> > I was reading the vol_msdosfs thread and this is what i've seen IRL
> > 
> > When dd'ing from a usb dongle to a file and then remove the dongle during
> > this operation, then a kernel panic might ocour. I can't tell where the
> > chain breaks. All this has been taken place on a 5.1-R box.
> 
> Only "might occur"? I would have thought it would panic 100%! The correct
> solution to this problem is "Don't do that"

Despite my flippant response, this is a FAQ. I have heard some rumblings
that this may be fixed One Day (tm), but I wouldn't hold my breath. The
problem is deep in the kernel and is non-trivial to fix (from what I've
been told anyway).

-gordon
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