[Bug 195485] New: [ufs] mksnap_ffs(8) cannot create snapshot with journaled soft updates enabled

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195485

            Bug ID: 195485
           Summary: [ufs] mksnap_ffs(8) cannot create snapshot with
                    journaled soft updates enabled
           Product: Base System
           Version: 10.1-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: bin
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: fw at moov.de

On FreeBSD 10.1 amd64 it is still not possible to create UFS snapshots if
journaled soft updates is enabled:

mksnap_ffs: Cannot create snapshot /home/.snap/dump_snapshot: /home: Snapshots
are not yet supported when running with journaled soft updates

This long-standing limitation should be fixed to allow running dump(8) in this
configuration.

Maybe a note should be added to the dump(8) man page and the FreeBSD Handbook,
chapter 18.8.1. "File System Backups" to properly document this limitation.

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