"Alexey Shuvaev" <shuvaev_at_physik.uni-wuerzburg.de> wrote: > On Wed, Aug 20, 2008 at 11:43:35PM +0200, Fabian Keil wrote: > > Warner Losh <imp_at_bsdimp.com> wrote: > > > > > From: Bakul Shah <bakul_at_bitblocks.com> > > > > Accidentally unplugging a mounted USB disk (without > > > > unmounting it) resulted in a hang or a crash. Is this fixed? > > > > > > That's fixed in -current right now with the old stack. It isn't a usb > > > issue at all, but a buffer cache issue. > > > > I can't confirm this for either msdosfs or geli (with ZFS). > > > > In case of msdosfs the situation has been vastly improved > > and the panic seems to be no longer guaranteed, but there's > > still a fair chance it'll happen eventually. > > > It was discussed now and then on freebsd-usb mailing list. I'm not subscribed to freebsd-usb so I'm not sure what was or wasn't discussed there, but I also don't see how it's relevant here. All I'm saying is that unplugging a mounted USB disk is very likely to panic my system running FreeBSD 8.0-CURRENT #2: Fri Aug 15 23:35:09 CEST 2008 eventually and thus I wouldn't call the problem fixed just yet. > Have a look at http://www.gulbra.net/freebsd-usb/ It seems to be mainly about patches against FreeBSD 7.0-BETA1.5, I'm talking about CURRENT without additional patches. > As for the non-msdosfs formatted media, I am quite sure it is a really bad > idea to unplug media before unmounting it (there is actually no difference > between "removable" and "stationary" drives). That's besides the point. Fabian
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