Date: Sun, 29 Jul 2007 15:41:42 -0500 From: "illoai@gmail.com" <illoai@gmail.com> To: Modulok <modulok@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: "umount -f" Complete system crash... Message-ID: <d7195cff0707291341w119936c7v9fd5a71a6e8ca04a@mail.gmail.com> In-Reply-To: <64c038660707282109v1f846962o8a7d52c4dc4c4fb2@mail.gmail.com> References: <64c038660707282109v1f846962o8a7d52c4dc4c4fb2@mail.gmail.com>
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On 28/07/07, Modulok <modulok@gmail.com> wrote: > BACKGROUND > Someone brought me a camera they were having trouble with: winXP > refused to mount the file system. I tried it on FreeBSD 6.1-RELEASE, > "mount_msdosfs /dev/da0s1 /mnt", no problems. I recovered all of their > photos. I attempted to "umount /mnt" and encountered an error, > something along the lines of cannot contact device, (I don't remember > exactly. No, I wasn't in the directory I was attempting to umount.). > No other process was communicating with the device, according to the > camera it was 'idle'. I issued a "umount -f /mnt" command. The entire > system locked up for a few seconds (maybe 4) and then CRASH! I found > myself looking at my BIOS output as the system reboots. > > QUESTIONS > 1. Obviously, why did FreeBSD crash? (More specifically what could > cause a crash in this situation?) > 2. How do I find out, why it crashed? > 3. Did I do something terribly unorthodox to invoke this crash, given > the situation? If so, what could be done different? > The camera powered itself down after being idle for a bit, perhaps? There have been some recent discussions, about physical disconnections of mounted devices causing panics, on this list over the last several weeks. -- --
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