8.0-BETA4 panic: ffs_sync: rofs mod
mel.flynn+fbsd.current at mailing.thruhere.net
Wed Sep 9 07:02:37 UTC 2009
On Wednesday 09 September 2009 02:55:04 Jeff Blank wrote:
> On Wed, Sep 09, 2009 at 01:57:31AM +0200, Pawel Jakub Dawidek wrote:
> > On Tue, Sep 08, 2009 at 04:25:53PM -0400, Jeff Blank wrote:
> > > Please let me know if I need to provide more details.
> > [...]
> > > fs = /old
> > > panic: ffs_sync: rofs mod
> > I have no idea why UFS thinks file system is read-only.
> hmm, I do have it marked as read-only in /etc/fstab, but I'd been
> mounting it with '-o rw'.
This problem has also been seen on -questions  and I forgot to follow
up after time issues. According to the poster it's easy to reproduce:
- have a mountpoint in /etc/fstab with ro options
- unmount the mountpoint
- remount using -o rw
The behavior does not occur if one uses mount -u -o rw without unmounting. I
think this is a too easy way to panic the kernel.
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