'mount -u' stumper

[Traiano Welcome]

This seems pertinent:

----
11.12.2 Soft Updates

The tunefs(8) program can be used to fine-tune a file system. This program has many different options, but for now we are only concerned with toggling Soft Updates on and off, which is done by:

# tunefs -n enable /filesystem
# tunefs -n disable /filesystem

---> A filesystem cannot be modified with tunefs(8) while it is mounted. A good time to enable Soft Updates is before any partitions have been mounted, in single-user mode.
---

From:

http://docs.freebsd.org/doc/7.2-RELEASE/usr/share/doc/handbook/configtuning-disk.html

Looks like you're flat out of luck :-)

Cheers,
Traiano


________________________________________
From: owner-freebsd-questions at freebsd.org [owner-freebsd-questions at freebsd.org] on behalf of Robert Bonomi [bonomi at mail.r-bonomi.com]
Sent: Wednesday, June 22, 2011 1:45 PM
To: freebsd-questions at freebsd.org
Subject: 'mount -u' stumper

Environment is FreeBSD 7.2  i386

I have a Berkeley FFS filesystem that is mounted ro at boot time.

If I do a 'mount -u' to make it writable, it _is_ made writable, but
"soft-updates' is also set.   Incidentally, does anybody know _where_
the 'soft-updates' optioon is documented??  I've looked evereywhere I
can think of, brute-force grepped wholee sections of the /usr/share/man
directory tree, all without succeess.

If I use 'mount -u -r' to return it to the readonly state, 'soft-updates' is
*still* set.

_HOW_ do I make'soft-updates' go away on a mounted filesystem ??

'umount' and then 'mount' does the trick, but it is no a viable production'
option.

THe underlying situation -- the need to make the filesystem writable -- comes
up only rarely, and it doesn't seem to hurt anything if the filesystem is
left with soft-updates set, but I _would_ like to clear it, because it *is*
logically inconsistant with the read-only status of the filesystem.

Anybody got a bright idea I haven't thought of?



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