Date: Wed, 2 Jul 2014 08:14:53 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: Dan Plassche <dplassche@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: Dump an Unmounted Journaled UFS Filesystem Message-ID: <alpine.BSF.2.11.1407020755250.89636@wonkity.com> In-Reply-To: <CAOD8Yqq5O1ZJ1RwGDTLnLtcvR0MhbLZEfWnOihaJL0xz875pOA@mail.gmail.com> References: <CAOD8YqoB%2BZpS9XBgFf2=WjWmsG5f9MsiwSis1cB3irKOOz=ZSw@mail.gmail.com> <CAOD8Yqq5O1ZJ1RwGDTLnLtcvR0MhbLZEfWnOihaJL0xz875pOA@mail.gmail.com>
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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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