operation not permitted on entropy file

Polytropon freebsd at edvax.de
Mon Aug 11 15:16:58 UTC 2014

On Mon, 11 Aug 2014 09:52:00 -0500, Adam Vande More wrote:
> Try fsck'ing a nearly full TB FS on a production box that has had a dirty
> unmount and you will begin to appreciate the adventure a bit more.

I prefer appreciating my precious data. :-)

No, honestly: On production systems, this might be an issue
(which should be resolved by appropriate countermeasures, as
we're probably talking about mission-critical systems), but
for home systems, it surely isn't that bad. I'm saying this
from my very individual experience of having fsck work on
a nearly full 1 TB disk several times a week, in worst cases,
few times a day. And I don't even care that it takes more
than 10 minutes, as it makes sure my data is safe.

> > And if I don't have
> > soft updates by default, then why are they being reported by fsck?
> >
> This statement doesn't make sense.  Can you post the output you're seeing
> along with the mount options in play?

Having _no_ soft updates is probably only true for / when the
traditional partitioned layout has been chosen in the installer
(that is, for sysinstall; I don't know bsdinstall's defaults
from my memory). All other partitions are usually initialized
with soft updates enabled.

Here's an example (restricted to disks):

	% mount
	/dev/ad4s1a on / (ufs, local)
	/dev/ad4s1d on /tmp (ufs, local, soft-updates)
	/dev/ad4s1e on /var (ufs, local, soft-updates)
	/dev/ad4s1f on /usr (ufs, local, soft-updates)
	/dev/ad4s1g on /opt (ufs, local, soft-updates)
	/dev/ad6 on /home (ufs, local, soft-updates)

As you can see, only / doesn't have soft updates enabled. This
is the choice I made in sysinstall (FreeBSD 8 here) when the
disk was new.

> > And for reference, I notice that journaling decisions need to be made
> > *prior* to creating the filesystem.
> >
> Journaling decisions can be made basically at anytime the FS isn't mounted
> or mounted ro using tunefs(1).

The safest way to change those settings is to enter single user
mode and use tunefs on the unmounted partitions.

Magdeburg, Germany
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...

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