Boot disk read-only?

[Andreas Nilsson]

You're welcome.

In /etc/rc there is:
dlv=`/sbin/sysctl -n vfs.nfs.diskless_valid 2> /dev/null`
if [ ${dlv:=0} -ne 0 -o -f /etc/diskless ]; then
        sh /etc/rc.initdiskless
fi

Have you tried to add vfs.nfs.diskless_valid to /etc/sysctl.conf?

I usually just touch /etc/diskless , works for me ;)

man diskless might have some more insights too, if you have not read it.

Best regards
Andreas

On Sun, Jul 22, 2012 at 5:24 PM, Sam Zehr <sam at athyriogames.com> wrote:

> Thanks Andreas****
>
> ** **
>
> I read the section on NanoBSD, but did not find any reference to ‘touch
> /etc/diskless/****
>
> ** **
>
> I also had advice to check to see what files are changing:****
>
> find / -mtime -1d –print****
>
> ** **
>
> Returns changes in /dev, /tmp, and /var only****
>
> ** **
>
> /tmp and /var are memory disks, I assume this is expected behavior.****
>
> ** **
>
> Sam****
>
> ** **
>
> *From:* Andreas Nilsson [mailto:andrnils at gmail.com]
> *Sent:* Sunday, July 22, 2012 5:02 AM
>
> ****
>
> On Sat, Jul 21, 2012 at 2:05 AM, Sam Zehr <sam at athyriogames.com> wrote:***
> *
>
> {edited for brevity}****
>
> How do I make a disk in FreeBSD 9.0 _completely_ read-only?
> rc.initdiskless is working
>
> 1. Add noatime to fstab options
> 2. Add vfs.nfs.diskless_valid=1 to /boot/loader.conf
> So far this is not working on BSD 9.0. It looks like something is changing
> on the disk during boot
> Sysctl vfs.nfs.diskless_valid returns 0 once booted up
> Please note that I am not just concerned about files - the entire disk
> needs
> to be locked, like ROM.
> Or perhaps a reason why setting vfs.nfs.diskless_valid=1 in
> /boot/loader.conf does not appear to work?
>
> ****
>
> ** **
>
> Perhaps start by reading
> http://www.freebsd.org/doc/en_US.ISO8859-1/articles/nanobsd/index.html which
> should contain the basics plus some nice extra features.****
>
> ** **
>
> Short version: did you do 'touch /etc/diskless' ?****
>
> ** **
>
> Best regards****
>
> Andreas****
>