Can I change the device of the "/" mount point at boot time.

[Tapan Chaudhari]

This is not exactly what I wanted. I will try to elaborate myself.
I am creating my own device which will act as a new boot slice which must be
mounted as '/'. New device will process i/o calls and then redirect the i/o
calls to original device of '/'. Now since I cannot unmount '/' and mount it
again with my new device while system is running, I will have to find a way
to tell kernel to mount my new device as '/' from next time onwards it
boots.
does anyone have suggestions on this?


Thanks,
--Tapan.

On Tue, Jul 15, 2008 at 12:10 AM, Jeremy Chadwick <koitsu at freebsd.org>
wrote:

> On Mon, Jul 14, 2008 at 11:36:52PM +0530, Tapan Chaudhari wrote:
> > Hi All,
> >     I am new to FreeBSD and this mailing list as well.
> > What I want to achieve is change the device of my mount point '/'(or any
> > other mount point) after I reboot the machine. I have some knowledge
> about
> > initrd in Linux in which I can change the device for '/' and than reboot
> the
> > machine so that it takes a new device for '/'.
> > How can I achieve this in FreeBSD? I am using the latest release 7.0. Any
> > pointers will be helpful.
>
> I think you're looking for the loader variables rootdev or
> root.vfs.mountrootfsfrom.
>
> --
> | Jeremy Chadwick                                jdc at parodius.com |
> | Parodius Networking                       http://www.parodius.com/ |
> | UNIX Systems Administrator                  Mountain View, CA, USA |
> | Making life hard for others since 1977.              PGP: 4BD6C0CB |
>
>