FreeBSD 9.1 and SU+J

[Bas Smeelen]

On 11/04/2012 02:11 PM, RW wrote:
> On Sun, 04 Nov 2012 11:44:28 +0100
> Bas Smeelen wrote:
>
>> On 11/03/2012 07:30 PM, Herbert J. Skuhra wrote:
>>> On 03.11.2012 13:48, Doug Hardie wrote:
>>>
>>>> I didn't notice that journaling is on by default and now dump is
>>>> failing.  The only way I can see to disable journaling requires
>>>> that the file system be dismounted, or read-only.  This is a
>>>> remote machine and journaling is on root.  Is there any other way
>>>> that would not require me to make a long trip out to the site?
>>> This is a task for mfsBSD: http://mfsbsd.vx.sk
>>>
>> Hmm, I think you have to make a trip or get some kind of remote
>> console over ip.
>> I tried it remote on a 9.1-RC2 system that has / /tmp /var and /usr
>> as seperate partions
>> For / i can do a mount -o ro / and tunefs -j disable /dev/da0p2 then
>> mount -o rw /
>> For the /tmp /var and /usr filesystems this does not work bcause hey
>> cannot be remounted ro while they are busy.
> A quick and dirty way to do it would be to edit /etc/rc.d/fsck and put
> your tunefs commands at the bottom of fsck_start(), then do a reboot.

Very nice :) Thanks a lot!
I tried this and can confirm it works.
_But_ not all partitions are soft updates without journaling now.
It didn't work for the / partition, I guess because / is mounted rw 
before /etc/rc.d/fsck is executed.
For the / partition I guess I will really have to be at the console 
starting single user, because mount -o ro en then disable with tunefs -j 
disable did not work either. See at the end of this mail.
I wonder if it even can be accomplished when booting single user, which 
I cannto test right now.

Doug, if you have more partitions than just / you could go ahead with 
the above solution, it worked for me. You can then at least dump data 
from your other partitions.

See below:

root at osebart:/usr/home/Freebee # mount
/dev/da0p2 on / (ufs, local, journaled soft-updates)
devfs on /dev (devfs, local, multilabel)
/dev/da0p3 on /tmp (ufs, local, journaled soft-updates)
/dev/da0p4 on /var (ufs, local, journaled soft-updates)
/dev/da0p5 on /usr (ufs, local, journaled soft-updates)

edit /etc/rc.d/fsck and added:

/sbin/tunefs -j disable /dev/da0p2
/sbin/tunefs -j disable /dev/da0p3
/sbin/tunefs -j disable /dev/da0p4
/sbin/tunefs -j disable /dev/da0p5

just before
}

load_rc_config $name
run_rc_command "$1"

at the end.

shutdown -r now and I have

root at osebart:/usr/home/Freebee # mount
/dev/da0p2 on / (ufs, local, journaled soft-updates)
devfs on /dev (devfs, local, multilabel)
/dev/da0p3 on /tmp (ufs, local, soft-updates)
/dev/da0p4 on /var (ufs, local, soft-updates)
/dev/da0p5 on /usr (ufs, local, soft-updates)

See below for mount -o ro

root at osebart:/usr/home/Freebee # mount -o ro /
root at osebart:/usr/home/Freebee # mount
/dev/da0p2 on / (ufs, local, read-only)
devfs on /dev (devfs, local, multilabel)
/dev/da0p3 on /tmp (ufs, local, soft-updates)
/dev/da0p4 on /var (ufs, local, soft-updates)
/dev/da0p5 on /usr (ufs, local, soft-updates)
root at osebart:/usr/home/Freebee # tunefs -j disable /dev/da0p2
Clearing journal flags from inode 4
tunefs: soft updates journaling cleared but soft updates still set.
tunefs: remove .sujournal to reclaim space

shutdown -r now but still

root at osebart:/usr/home/Freebee # mount
/dev/da0p2 on / (ufs, local, soft-updates)
devfs on /dev (devfs, local, multilabel)
/dev/da0p3 on /tmp (ufs, local, soft-updates)
/dev/da0p4 on /var (ufs, local, soft-updates)
/dev/da0p5 on /usr (ufs, local, soft-updates)








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