>>461
こういう方向でバンドエイドが……

Author: mckusick
Date: Tue Jan 17 01:14:56 2012
New Revision: 230250
URL: http://svn.freebsd.org/changeset/base/230250

http://docs.FreeBSD.org/cgi/mid.cgi?201201170114.q0H1Ev02060628
Log:
There are several bugs/hangs when trying to take a snapshot on a UFS/FFS
filesystem running with journaled soft updates. Until these problems
have been tracked down, return ENOTSUPP when an attempt is made to
take a snapshot on a filesystem running with journaled soft updates.

MFC after: 2 weeks