Hi Dave, Thanks for your answer!So it seems I might have found somebody to fight through this RAID/grub jungle? :)
/// about my hardware /// What I have (and can offer as a test-platform): Sony VAIO notebook where CTRL+I during startup brings me to Intel(R) Rapid Storage Technology - Option ROM - 9.5.0.1037 At the moment I have 1 RAID-0 on all 4 SATA drives. I think this version (Sony limited?) only supports RAID-0 and maybe 1. mdadm --examine on the container /dev/md127 gives me: Magic : Intel Raid ISM Cfg Sig Version : 1.2.01 Faimily : ba0a95b0 Generation : 0000025c lspci shows me:00:1f.2 RAID bus controller: Intel Corporation Mobile 82801 SATA RAID Controller (rev. 05)
/// about Fedora (13) ////My core goal was more to explore and document the MANUAL setup of grub/grub2 (for people compiling from source or using Gentoo). Basically to document the knowledge needed to do-it-yourself in order to save people like me some precious time in collecting all the bits and pieces themselves. For the several distributions out there: I would have probably just linked to their own HowTos once we get information that it works (like I got this information for Ubuntu for example).
I personally use Gentoo --> no fancy GUI/install-scripts, but everything manual :)
As I said: Ubuntu has a device-mapper based binary package of grub2 that seems to install itsself in a way that allows to boot from an Intel OROM RAID (fakeraid). But that doesn't help me with Gentoo.
But I am really stuck alone, so I am willing to throw a Fedora on my machine if in exchange I would get the grub commands to make grub boot my intel RAID-0 :)
> Just FYI Intel is moving forward with MDRAID. Nice :) Do you happen to know if mdadm just integrated (parts of) the dmraid code? Because that's one of the many /rumors/ I picked up ;) (and that I would like to put to an end ;) Let me know. Thanks! Knuth --- On 19/08/10 13:49, Jiang, Dave wrote:
-----Original Message----- From: linux-raid-owner@xxxxxxxxxxxxxxx [mailto:linux-raid- owner@xxxxxxxxxxxxxxx] On Behalf Of K. Posern Sent: Wednesday, August 18, 2010 9:56 PM To: linux-raid@xxxxxxxxxxxxxxx Subject: getting a linux boot loader (preferably grub) installed on an intel imsm raid b) based on mdadm-imsm. Just there seems really /no/ documentation out there on how to do it (or I successfully managed to google around it since days now ;).There is a section in regards to external metadata https://raid.wiki.kernel.org/index.php/RAID_setup#External_Metadata But I guess I need to update with additional information on how to install to it. Do you have Intel MSM Option ROM on your system? If so, then you create a RAID volume in the RAID optionROM and then when you do a install say for example Fedora 12, you specifiy you have "advanced storage device" (I think?) and you will see the RAID volume available for installation. I had issues with Fedora 13. There is a bug that causes crash when you attempt to install to an IMSM volume. And yes you install to the volume. The container can have 2 different RAID volumes.P.S.: I would be still interested to hear how the two solutions that support an intel BIOS-supported (mdadm-imsm>=v3 and dmraid>=v1) raid compare to each other in terms of: speed (throughput), load/overhead (cpu/ram), stability, features.Just FYI Intel is moving forward with MDRAID.
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