The "dataset is busy" problem is due to the following bug: http://bugs.opensolaris.org/view_bug.do?bug_id=6749498
itself a duplicate of the underlying zfs bug http://bugs.opensolaris.org/view_bug.do?bug_id=6462803 The workaround is to mount and unmount the old boot environments (hence zfs filesystems) if you can do # zfs snapshot -r rpool at snap without error messages, then the snapshot services should all be able to run again, # zfs clear frequent hourly daily weekly monthly -- This message posted from opensolaris.org
