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Date:      Sun, 04 Nov 2012 16:04:48 +0100
From:      Bas Smeelen <b.smeelen@ose.nl>
To:        freebsd-questions@freebsd.org
Subject:   Re: FreeBSD 9.1 and SU+J
Message-ID:  <50968410.60506@ose.nl>
In-Reply-To: <509674FB.9080208@ose.nl>
References:  <AD4BB781-B3A3-4E26-966A-BAF4C3813B8E@lafn.org> <6a6b6ddcdec1296708c054d73b7b5a34@eumx.net> <5096470C.20904@ose.nl> <20121104131104.71e81e3a@gumby.homeunix.com> <509674FB.9080208@ose.nl>

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On 11/04/2012 03=3A00 PM=2C Bas Smeelen wrote=3A
=3E On 11/04/2012 02=3A11 PM=2C RW wrote=3A
=3E=3E On Sun=2C 04 Nov 2012 11=3A44=3A28 +0100
=3E=3E Bas Smeelen wrote=3A
=3E=3E
=3E=3E=3E On 11/03/2012 07=3A30 PM=2C Herbert J=2E Skuhra wrote=3A
=3E=3E=3E=3E On 03=2E11=2E2012 13=3A48=2C Doug Hardie wrote=3A
=3E=3E=3E=3E
=3E=3E=3E=3E=3E I didn=27t notice that journaling is on by default and now=
 dump is
=3E=3E=3E=3E=3E failing=2E  The only way I can see to disable journaling re=
quires
=3E=3E=3E=3E=3E that the file system be dismounted=2C or read-only=2E  This=
 is a
=3E=3E=3E=3E=3E remote machine and journaling is on root=2E  Is there any o=
ther way
=3E=3E=3E=3E=3E that would not require me to make a long trip out to the si=
te=3F

I guess I was a little off here=2C it actually worked for / also
See further below for the whole story
This was all done remote with ssh

=24 mount
/dev/da0p2 on / =28ufs=2C local=2C soft-updates=29
devfs on /dev =28devfs=2C local=2C multilabel=29
/dev/da0p3 on /tmp =28ufs=2C local=2C soft-updates=29
/dev/da0p4 on /var =28ufs=2C local=2C soft-updates=29
/dev/da0p5 on /usr =28ufs=2C local=2C soft-updates=29
=24 su
Password=3A
root=40osebart=3A/usr/home/Freebee =23 rm /=2Esujournal
root=40osebart=3A/usr/home/Freebee =23 rm /var/=2Esujournal
root=40osebart=3A/usr/home/Freebee =23 rm /tmp/=2Esujournal
root=40osebart=3A/usr/home/Freebee =23 rm /usr/=2Esujournal
root=40osebart=3A/usr/home/Freebee =23 uname -a
FreeBSD osebart=2Eose=2Enl 9=2E1-RC2 FreeBSD 9=2E1-RC2 =230 r241106=3A Mon=
 Oct 1=20
18=3A26=3A44 UTC 2012=20
root=40farrell=2Ecse=2Ebuffalo=2Eedu=3A/usr/obj/usr/src/sys/GENERIC  amd64=


=3E=3E=3E=3E This is a task for mfsBSD=3A http=3A//mfsbsd=2Evx=2Esk
=3E=3E=3E=3E
=3E=3E=3E Hmm=2C I think you have to make a trip or get some kind of remote=

=3E=3E=3E console over ip=2E
=3E=3E=3E I tried it remote on a 9=2E1-RC2 system that has / /tmp /var and=
 /usr
=3E=3E=3E as seperate partions
=3E=3E=3E For / i can do a mount -o ro / and tunefs -j disable /dev/da0p2 t=
hen
=3E=3E=3E mount -o rw /
=3E=3E=3E For the /tmp /var and /usr filesystems this does not work bcause=
 hey
=3E=3E=3E cannot be remounted ro while they are busy=2E
=3E=3E A quick and dirty way to do it would be to edit /etc/rc=2Ed/fsck and=
 put
=3E=3E your tunefs commands at the bottom of fsck=5Fstart=28=29=2C then do=
 a reboot=2E
=3E Very nice =3A=29 Thanks a lot!
=3E I tried this and can confirm it works=2E
=3E =5FBut=5F not all partitions are soft updates without journaling now=2E=

=3E It didn=27t work for the / partition=2C I guess because / is mounted rw=

=3E before /etc/rc=2Ed/fsck is executed=2E
=3E For the / partition I guess I will really have to be at the console
=3E starting single user=2C because mount -o ro en then disable with tunefs=
 -j
=3E disable did not work either=2E See at the end of this mail=2E
=3E I wonder if it even can be accomplished when booting single user=2C whi=
ch
=3E I cannto test right now=2E
=3E
=3E Doug=2C if you have more partitions than just / you could go ahead with=

=3E the above solution=2C it worked for me=2E You can then at least dump da=
ta
=3E from your other partitions=2E
=3E
=3E See below=3A
=3E
=3E root=40osebart=3A/usr/home/Freebee =23 mount
=3E /dev/da0p2 on / =28ufs=2C local=2C journaled soft-updates=29
=3E devfs on /dev =28devfs=2C local=2C multilabel=29
=3E /dev/da0p3 on /tmp =28ufs=2C local=2C journaled soft-updates=29
=3E /dev/da0p4 on /var =28ufs=2C local=2C journaled soft-updates=29
=3E /dev/da0p5 on /usr =28ufs=2C local=2C journaled soft-updates=29
=3E
=3E edit /etc/rc=2Ed/fsck and added=3A
=3E
=3E /sbin/tunefs -j disable /dev/da0p2
=3E /sbin/tunefs -j disable /dev/da0p3
=3E /sbin/tunefs -j disable /dev/da0p4
=3E /sbin/tunefs -j disable /dev/da0p5
=3E
=3E just before
=3E =7D
=3E
=3E load=5Frc=5Fconfig =24name
=3E run=5Frc=5Fcommand =22=241=22
=3E
=3E at the end=2E
=3E
=3E shutdown -r now and I have
=3E
=3E root=40osebart=3A/usr/home/Freebee =23 mount
=3E /dev/da0p2 on / =28ufs=2C local=2C journaled soft-updates=29
=3E devfs on /dev =28devfs=2C local=2C multilabel=29
=3E /dev/da0p3 on /tmp =28ufs=2C local=2C soft-updates=29
=3E /dev/da0p4 on /var =28ufs=2C local=2C soft-updates=29
=3E /dev/da0p5 on /usr =28ufs=2C local=2C soft-updates=29
=3E
=3E See below for mount -o ro
=3E
=3E root=40osebart=3A/usr/home/Freebee =23 mount -o ro /
=3E root=40osebart=3A/usr/home/Freebee =23 mount
=3E /dev/da0p2 on / =28ufs=2C local=2C read-only=29
=3E devfs on /dev =28devfs=2C local=2C multilabel=29
=3E /dev/da0p3 on /tmp =28ufs=2C local=2C soft-updates=29
=3E /dev/da0p4 on /var =28ufs=2C local=2C soft-updates=29
=3E /dev/da0p5 on /usr =28ufs=2C local=2C soft-updates=29
=3E root=40osebart=3A/usr/home/Freebee =23 tunefs -j disable /dev/da0p2
=3E Clearing journal flags from inode 4
=3E tunefs=3A soft updates journaling cleared but soft updates still set=2E=

=3E tunefs=3A remove =2Esujournal to reclaim space
=3E
=3E shutdown -r now but still
=3E
=3E root=40osebart=3A/usr/home/Freebee =23 mount
=3E /dev/da0p2 on / =28ufs=2C local=2C soft-updates=29
=3E devfs on /dev =28devfs=2C local=2C multilabel=29
=3E /dev/da0p3 on /tmp =28ufs=2C local=2C soft-updates=29
=3E /dev/da0p4 on /var =28ufs=2C local=2C soft-updates=29
=3E /dev/da0p5 on /usr =28ufs=2C local=2C soft-updates=29
=3E
=3E
=3E


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