Date: Tue, 29 Jun 1999 00:39:45 -0700 From: Travis Cole <tcole@balsam.methow.com> To: Jamie Howard <howardjp@wam.umd.edu>, Zhihui Zhang <zzhang@cs.binghamton.edu> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: A way to crash system (3.1 & 3.2) with floppy Message-ID: <19990629003945.A28540@wcug.wwu.edu> In-Reply-To: <Pine.LNX.4.10.9906282128380.30685-100000@dragon.ham.muohio.edu>; from Jamie Howard on Mon, Jun 28, 1999 at 09:30:05PM -0400 References: <Pine.GSO.3.96.990628214558.21814A-100000@sol.cs.binghamton.edu> <Pine.LNX.4.10.9906282128380.30685-100000@dragon.ham.muohio.edu>
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On Mon, Jun 28, 1999 at 09:30:05PM -0400, Jamie Howard wrote: > On Mon, 28 Jun 1999, Zhihui Zhang wrote: > > > Suppose you have a *write-protected* DOS floppy and you do: > > > > # mount -t msdos /dev/fd0 /floppy <-- this is OK > > > > # cp somefile /floppy <-- a lot of error messages > > > > # umount /floppy <-- crash > > > > Now the system tries to sync the dirty buffers and fails. You have to > > press a key to reboot. > > > > Is there anything wrong here or FreeBSD simply does not handle this in a > > more elegant way? > > > > Thanks for any help. > > I had this happen to me the other day on my 3.2 system. I thought it was > just me because I had mounted the disk several days before and figured I > had swapped it out. I also had to reformat the floppy on a Win95 system > to make it usable again. > > Jamie I just reproduced this on a system running 4.0-CURRENT from about Sun Jun 27 01:12:42 PDT I got a ton of these errors in dmesg and /var/log/messages: Jun 29 00:17:53 marx /kernel: fd0c: hard error writing fsbn 19 (ST0 40<abnrml> ST1 2<write_protect> ST2 0 cyl 0 hd 1 sec 2) And it let me try several umount commands and even a umount -f. None of them actualy umounted the floppy drive and it completly reboot my computer after about 2 or 3 mins. No panic or anything. Once second I'm looking at X, next second I'm looking at my BIOS bootup screen. -- --Travis To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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