Locking a file backed mdconfig into memory

[Dave Hayes]

Jeremy Chadwick <freebsd at jdc.parodius.com> writes:
> On Fri, May 28, 2010 at 10:57:29AM -0700, Dave Hayes wrote:
>> Clifton Royston <cliftonr at lava.net> writes:
>> > It sounds like what you really want is to load the contents of the
>> > specified file as a memory system?  That's not part of mdconfig's
>> > repertoire, to the best of my recollection.  
>> 
>> So if, in /etc/loader.conf, I do this:
>> 
>> rootfs_load="YES"
>> rootfs_type="mfs_root"
>> rootfs_name="/mfsboot"
>> vfs.root.mountfrom="ufs:md0"
>
> I think you mean /boot/loader.conf?  

Yes, you are correct.

> And I think you meant this for variable names, in addition to what
> vfs.root.mountfrom should be (specific to RELENG_8):
> mfsroot_load="YES"
> mfsroot_type="mfs_root"
> mfsroot_name="/some/path/mfsroot"

I'm using RELENG_7, but it seems rootfs_* works just like mfsroot_* ...
is the former deprecated? 

> vfs.root.mountfrom="ufs:/dev/md0"

Hm, 'ufs:md0' currently works. What trouble can be had from using
the abbreviated device name?

> If using RELENG_7 and the mfsroot was made on RELENG_7, replace
> "/dev/md0" with "/dev/md0c".

Is there a reason for doing this? 
-- 
Dave Hayes - Consultant - Altadena CA, USA - dave at jetcafe.org 
>>> The opinions expressed above are entirely my own <<<

If you want to strengthen an enemy -- hate them.