Hi all, I am trying to find out if it is possible to:a) Have the linux kernel autodetect / auto-assemble the fakeraid (to avoid having an initrd (for speed and KISS))
b) Boot linux kernel from a fakeraid this: grub2? lilo? ... anything? About (a): Is it possible to autodetect any intel fakeraid (imsm)?If yes: What RAID-Levels are supported? Especially what would I need to do to get my RAID-0 auto-assembled?
If no: Are there plans? About (b):What boot-loader support to assemble the intel fakeraid to read the kernel from it - e.g. are able to assemble the /boot partition on the RAID (especially: level 0)?
According to this wiki entry: http://wiki.neuralbs.com/index.php/Gentoo_Quick_Install_notes#GRUB2grub2 should support imsm (but grep for imsm in the Bazaar checkout does not yield any hit) <<< I also contacted the grub2 mailing-list for clarification I learned today that Ubuntu seems to be able to boot from a RAID-0 with grub2 (v1.98-1ubuntu7) and seemingly installed to /dev/mapper/isw_*. So far I only tried to install vanilla grub 1.98 to the mdadm v3 devices /dev/md12[67], without success. In the documentation of grub2 (afaik) they don't distinguish between mdadm/dmraid software raid, they just state that grub2 works with software raid.
Side-Question:To be able to have the kernel auto-assemble / autodetect any [e.g. mdadm] linux software RAID-0 you need *partions*, right?
--> You can't assemble a software raid-0 using two complete drives: /dev/sda /dev/sdb But you need to create e.g.: /dev/sda1 <<< type set to FD /dev/sdb1 <<< type set to FDIt would be great and very kind if someone could clarify these things for me (just a link to read the answers somewhere would work too ;).
Thanks a lot! Knuth P.S.:I adore Intels engagement for linux. Unfortunately is there no website (yet?) "intellinuxraid.org" (like there is: intellinuxgraphics.org).
The only official information from intel (google: intel raid linux) I could dig up so fare states: imsm is supported with mdadm >=v3 and dmraid >=v1. That leaves a lot of questions (eg. I never saw any details on how the intel software raid format works - e.g. I noticed that the first physical device of my RAID-0 seems to have the primary paritions, all the other RAID-0 devices are unpartitioned).
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