Date: Fri, 7 Dec 2012 15:28:37 +0100 From: CeDeROM <cederom@tlen.pl> To: Ivan Voras <ivoras@freebsd.org> Cc: freebsd-current@freebsd.org Subject: Re: UFS2 and Journaling in 9.1-RC3 Message-ID: <CAFYkXjkH-Bj5ee7Y1dgEKXQQpdGwVUe7J=WEiAmJsO7T_uHyqw@mail.gmail.com> In-Reply-To: <k9srm6$56d$1@ger.gmane.org> References: <CAFYkXj=iv_MWhLC5YTfXGZA7RdLt3iEEjT_sDfPETCDf%2BK-KaQ@mail.gmail.com> <k9srm6$56d$1@ger.gmane.org>
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On Fri, Dec 7, 2012 at 2:41 PM, Ivan Voras <ivoras@freebsd.org> wrote: > It looks like you are confusing GEOM journalling (-J) and UFS-SU > journalling (-j). They are very different, and today you probably want > to use the latter. If you are installing 9.x from scratch, it will be > enabled by default. If not, you can use newfs -j or tunefs -j to enable it. "When any other means fail, read the manual" heh :-) I am still a bit confused, even after reading [1], because there is no explanation of difference between GJournal and SU / SU+J (which was introduced in FreeBSD 9.0). I understand GJournal works below filesystem level and I dont need to use fsck. SU/SU+J is part of the UDF/UDF2 filesystem. I should not use SU and GJournal at the same time. What are the advantages of SU/US+J? What is the advantage of SU+J over SU? Should I use Gjournal or SU/SU+J? Any hints welcome! :-) If I have already created UFS2 with -J, I understand I can switch it off, can I then simply turn of UFS+J (-j) with no data loss on existing filesystem? Which solution is better for drives >1TB when I dont want to wait an hour for fsck? [1] http://www.freebsd.org/doc/en_US.ISO8859-1/articles/gjournal-desktop/index.html Thanks! :-) Tomek -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info
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