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Date: Tue, 4 Mar 2014 22:19:15 -0700 (MST)
From: Warren Block <wblock@wonkity.com>
To: aurfalien <aurfalien@gmail.com>
Subject: Re: mdconfig via rc.conf
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On Tue, 4 Mar 2014, aurfalien wrote:

> Hi,
>
> Apology for the cross post as I asked in the general questions list and also if this is not an appropriate question.
>
> But are there any other parameters I would need to setup a ram disk at boot time?
>
> I have this in my rc.conf;
>
> mdconfig_md100=?-t malloc -s 12G?

rc.conf is sourced, but not the place for code.

> I?ve opted not to mount or format it for now.
>
> But upon boot, I do not see the md100 device.
>
> Is there anything I need in rc.conf to enable this?

It depends on the version of FreeBSD.  On FreeBSD 10, it's easy to do 
with an entry in /etc/fstab, see fstab(5).  For earlier versions, I'm 
not sure of the best way.  There's /etc/rc.local, but may be more 
automated ways in the other rc scripts.