On Tue, 1 Jul 2014, Dan Plassche wrote:
> I understand that using dump is not currently recommended on a mounted
> journaled UFS2 filesystem. I prefer to boot from a separate FreeBSD drive
> for cold backups anyway, so I'm wondering if there are any issues with
> running dump on an unmounted journaled filesystem? All the discussions
> I've seen seem to focus on disabling journaling completely, which I would
> like to avoid.
The snapshot code in sys/ufs/ffs/ffs_snapshot.c still prevents making
snapshots on SUJ filesystems.
So pick the way that seems best: dump without a snapshot, use something
other than dump like rsync, or turn off SUJ:
https://forums.freebsd.org/viewtopic.php?&t=41503
Some people have mentioned that they see crashes more frequently with
SUJ enabled, so it might be both the cure and part of the problem.
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