Arch linux full raid

Question

I am experimenting with arch and mdadm I was using the following guide:
http://linux-101.org/howto/arch-linux-s … tion-guide
I get into trouble (at least I notice it at that point) with the bootloader. find /boot/grub/stage1 returns Error 15: File not found, so running the commands:
grub> device (hd0) /dev/sda
grub> root (hd0,0)
grub> setup (hd0)
naturally result in the same problem.
Any indication what I am doing wrong? Maybe the tutorial is out of date?

Answer 1

Blµb wrote:I think you're missing that 'device (hd0) /dev/sdX defines hd0 to be /dev/sdX, which is once done for sda and then for sdb.
Yes I was/am missing that. I understand what you are saying and you have a point but I still have something daunting:
find /grub/stage1
(hd0,0)
(hd1,0) <---- what's this?
running the guide grub installs went fine but running:
grub> device (hd1) /dev/sdb
grub> root (hd1,0)
grub> setup (h1)
also works. Why?
I only have two harddisks installed, what is (hd1) as I was under the impression that it was /dev/sdb, which now seems to be incorrect...
Very confusing..
Blµb wrote:I'm curious about the md= entries in this guide though. Is the goal of this to not require mdassemble to be run in an initramfs? Because mdadm usually reads from /etc/mdadm.com in the initramfs to assemble the devices.
But what do I know, mdassemble segfaults for my intel imsm raid... so I'm still sticking to DM-raid though maybe this could help... and that doesn't help me in my case either (says "bad raid superblock magic")
You are referring to the "md=" in grub's menu.lst? I also remember this happening in a later stage. The strange thing is that it seems to work though... If you know a better/other guide/tutorial about this subject I would like to know about it.
Thanks allot for the information!
Last edited by whoop (2012-02-29 20:24:30)