Date: Tue, 09 Feb 1999 10:15:24 -0600 From: Benjamin Gavin <gavinb@supranet.net> To: freebsd-stable@FreeBSD.ORG Subject: Re: Reboot - reproducible Message-ID: <4.1.19990209101513.00a38650@mail.supranet.net>
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Hey all,
I am able to reproduce this behavior as well. In my case (3.0-STABLE
2/8/1999) merely trying to write to a write-protected disk will cause a
reboot. This is a _major_ problem, and is something that didn't exist
about 1 month ago when I CVSupped another server. Anyone know what's
causing these reboots? When mine reboots, I get:
< messages about the disk being write protected >
panic: dirty buffers
Syncing disks... 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 10 ...
When I tried it with Ctrl-C I got:
< messages about the disk being write protected >
panic: dirty buffers
Syncing disks... 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 ...
Ben
At 12:09 AM 2/9/99 +0100, you wrote:
>Thomas T. Veldhouse wrote:
>>
>> I did a make world lastnight off of 3.0 stable source code freshly cvsup.
>> I was trying to create some floppy disks using:
>>
>> dd if=boot.flp of=/dev/fd0
>>
>> I had forgotten to remove the write-protection from the diskette. The
>> drive suddenly started going wild (floppy drive). I tried to hit Cntl-C
>> after a second X locked up and the computer rebooted. I tried the
>> samething on my gateway machine and it also rebooted (STABLE-02061999).
>> Certainly hitting Cntl-C should not reboot the computer. The disks
>> were not synced in either case. I am wondering if this has anything to do
>> with the spontaneous reboots I have been getting under load.
>>
>
>Perhaps this problem is related to another one I found recently: when
>trying to mount (R/W) a write protected unit (nobody is perfect :-) ),
>such as a diskette or a MO disk, the kernel complaints, but the
>mount succeeds anyway. After that, unmounting the device is not possible.
>A diskette can be manually ejected for removing the write protection,
>but a MO disk (I suppose that the same would happen using a ZIP)
>cannot be ejected :-(. My next action is remount R/O (mount -u -r)
>the device: more kernel messages. And after that, an umount ends with
>a panic ("dirty buffers") _always_.
>
>-- JMA
>-----------------------------------------------------------------------
>José Mª Alcaide | mailto:jose@we.lc.ehu.es
>Universidad del País Vasco | mailto:jmas@es.FreeBSD.ORG
>Dpto. de Electricidad y Electrónica | http://www.we.lc.ehu.es/~jose
>Facultad de Ciencias - Campus de Lejona | Tel.: +34-946012479
>48940 Lejona (Vizcaya) - SPAIN | Fax: +34-944858139
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