Gentoo Archives: gentoo-user

From: "Liebich
To: gentoo-user@l.g.o, gentoo-user@l.g.o
Subject: RE: [gentoo-user] Is an Intel motherboard RAID better or worse than software RAID?
Date: Tue, 21 Oct 2008 18:04:27
Message-Id: 634E5748C35AC1409E0A42352E9960EA014A62D6@atnets15pa.ww300.siemens.net
In Reply to: Re: [gentoo-user] Is an Intel motherboard RAID better or worse than software RAID? by "Conway S. Smith"
1 On Mon, 20 Oct 2008 13:24:11 +0200
2 Volker Armin Hemmann <volker.armin.hemmann@××××××××××××.de> wrote:
3 > On Montag 20 Oktober 2008, Conway S. Smith wrote:
4 > > On Mon, 20 Oct 2008 08:54:20 +0200
5 > >
6 > > Wolfgang Liebich <Wolfgang.Liebich@×××××××.com> wrote:
7 > > > Hi,
8 > > >
9 > > > <SNIP>
10 > > >
11 > > > > the howtos on gentoo-wiki worked well for me.
12 > > >
13 > > > I'm working with them, too. Just one question remains: I want
14 > > > to use udev. Do I have to create the md devices or does udev
15 > > > that for me?
16 > >
17 > > udev will do it for you. But make sure your initramfs init script
18 > > unmounts /sys & /proc.
19 >
20 > just don't use an initramfs/initrd.
21 >
22
23 From my reading initramfs/initrd is the preferred way of handling
24 root filesystem on MD RAID - and the only way for metadata 1.[012]
25 (although I'm having trouble finding where I read that only 0.90
26 works w/ in-kernel detection/assembly).
27
28 From /usr/share/doc/mdadm-2.6.7/README.initramfs.bz2: "The preferred
29 way to assemble md arrays at boot time is using 'mdadm' or
30 'mdassemble' (which is a trimmed-down mdadm). To assemble an array
31 which contains the root filesystem, mdadm needs to be run before that
32 filesystem is mounted, and so needs to be run from an initial-ram-fs."
33
34
35 Conway S. Smith
36 --
37 The only "intuitive" interface is the nipple. After that, it's all
38 learned. (Bruce Ediger, bediger@××××××××.org, in comp.os.linux.misc,
39 on X interfaces.)