Re: [gentoo-user] Is an Intel motherboard RAID better or worse than software RAID?

["Conway S. Smith" <beolach@xmission.com>]

On Mon, 20 Oct 2008 13:24:11 +0200
Volker Armin Hemmann <volker.armin.hemmann@tu-clausthal.de> wrote:
> On Montag 20 Oktober 2008, Conway S. Smith wrote:
> > On Mon, 20 Oct 2008 08:54:20 +0200
> >
> > Wolfgang Liebich <Wolfgang.Liebich@siemens.com> wrote:
> > > Hi,
> > >
> > > <SNIP>
> > >
> > > > the howtos on gentoo-wiki worked well for me.
> > >
> > > I'm working with them, too. Just one question remains: I want
> > > to use udev. Do I have to create the md devices or does udev
> > > that for me?
> >
> > udev will do it for you.  But make sure your initramfs init script
> > unmounts /sys & /proc. 
> 
> just don't use an initramfs/initrd.
> 

From my reading initramfs/initrd is the preferred way of handling
root filesystem on MD RAID - and the only way for metadata 1.[012]
(although I'm having trouble finding where I read that only 0.90
works w/ in-kernel detection/assembly).

From /usr/share/doc/mdadm-2.6.7/README.initramfs.bz2: "The preferred
way to assemble md arrays at boot time is using 'mdadm' or
'mdassemble' (which is a trimmed-down mdadm).  To assemble an array
which contains the root filesystem, mdadm needs to be run before that
filesystem is mounted, and so needs to be run from an initial-ram-fs."


Conway S. Smith
-- 
The only "intuitive" interface is the nipple. After that, it's all
learned. (Bruce Ediger, bediger@teal.csn.org, in comp.os.linux.misc,
on X interfaces.)