Date: Thu, 6 May 2004 08:12:26 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Gordon Tetlow <gordon@freebsd.org> Cc: freebsd-geom@freebsd.org Subject: Re: USB fash devices and dd Message-ID: <20040506061226.GP24376@darkness.comp.waw.pl> In-Reply-To: <20040506011610.GF10016@spiff.melthusia.org> References: <20040504115919.L35168-100000@x12.dk> <20040505161516.GC10016@spiff.melthusia.org> <20040506011610.GF10016@spiff.melthusia.org>
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--QKFUq+IbM9AW97yF Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, May 05, 2004 at 06:16:10PM -0700, Gordon Tetlow wrote: +> 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: +> > >=20 +> > > Hi +> > >=20 +> > > I was reading the vol_msdosfs thread and this is what i've seen IRL +> > >=20 +> > > When dd'ing from a usb dongle to a file and then remove the dongle d= uring +> > > 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. +> >=20 +> > Only "might occur"? I would have thought it would panic 100%! The corr= ect +> > solution to this problem is "Don't do that" +>=20 +> 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). AFAIR I was having simlar problem with gbde on usb bar (da0) when file system from this device was mounted. I was able to fix panic in gbde, I was able to fix cam(4), but I wasn't able to fix UFS (maybe I should try harder). Anyway, without mounted file system it should be possible to fix this quite easy. --=20 Pawel Jakub Dawidek http://www.FreeBSD.org pjd@FreeBSD.org http://garage.freebsd.pl FreeBSD committer Am I Evil? Yes, I Am! --QKFUq+IbM9AW97yF Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAmddKForvXbEpPzQRArbpAJ9Wl8rc+UZb5wg3w28obPw2r/T0YQCfdXcx ebMNwxErGzBQYc6eSANZedA= =Cw0s -----END PGP SIGNATURE----- --QKFUq+IbM9AW97yF--
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