gjournal & fsck

Pawel Jakub Dawidek pjd at FreeBSD.org
Thu Aug 28 19:26:30 UTC 2008

On Thu, Aug 28, 2008 at 10:43:58AM -0400, Brian McCann wrote:
> On Thu, Aug 28, 2008 at 10:34 AM, Ivan Voras <ivoras at freebsd.org> wrote:
> > Brian McCann wrote:
> >> Hi all.  I'm having some problems with several servers I've built
> >> recently (7.0-RELEASE) that are using gjournal.  I had two reboot a
> >> few days ago (un-related to FreeBSD problems I think)...but when they
> >> came back up, the file systems wouldn't mount since they were not
> >> clean.  Now, I understand that UFS knows nothing about the fact that
> >> it's journaled, and the journaling knows nothing about UFS...but it's
> >
> > Actually UFS needs to know about gjournal for just this purpose. There's
> > a special option to newfs that tells the file system to be aware of
> > gjournal and it should request fscks.
> >
> >> my understanding that by using gjournal, you should really never need
> >> to fsck a file system.  However, the only way to get them to mount is
> >> by doing the fsck.  Is there something else I should be doing instead
> >> of fsck?
> >
> > man 8 tunefs
> >
> Yes...I apologize...I did that when I built the file system with
> "newfs -J".  Here's the tunefs -p output for one of the file systems:
> # tunefs -p /dev/da2.journal
> tunefs: ACLs: (-a)                                         disabled
> tunefs: MAC multilabel: (-l)                               disabled
> tunefs: soft updates: (-n)                                 disabled
> tunefs: gjournal: (-J)                                     enabled
> tunefs: maximum blocks per file in a cylinder group: (-e)  2048
> tunefs: average file size: (-f)                            16384
> tunefs: average number of files in a directory: (-s)       64
> tunefs: minimum percentage of free space: (-m)             8%
> tunefs: optimization preference: (-o)                      time
> tunefs: volume label: (-L)
> I'm concerned about this because the ones I've had problems with
> recently are 1.1TB arrays...I've got 2 8.6TB arrays that are journaled
> as well...and if I ever have to fsck them...that could take 1/2 the
> day...
> Any other thoughts?

Everything looks good. Do you have 'fsck_y_enable' in your rc.conf by
any chance? gjournal mode in fsck is only used for -p option, AFAIR.

Pawel Jakub Dawidek                       http://www.wheel.pl
pjd at FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!
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