Didier Kryn:
> Le 20/01/2016 13:14, Simon Hobson a écrit :
...
> > AIUI, if you use md and raid1, with metadata version 0.9, for
> > /boot - then each member of the raid set contains a complete
> > image of /boot which is safe to use read-only. So the bootloader
> > doesn't need to understand md, and the rest can be taken care of
> > in the initramfs/initrd (it's OK if said quickly and I slam the

You don't have to use initramfs to boot from md, just add

root=/dev/md2 md=2,/dev/sda2,/dev/sdb2

or similar to your boot cmdline or use CONFIG_MD_AUTODETECT=y
in your kernel config; see <kernel_source>/Documentation/md.txt.

> > lid back down before the worms crawl out !)
...

>      Dunno enough about metadata version, but, yes, I experimented this 
> setup with md1 and it worked. If boot fails from the first disk, you can 
> ask the BIOS to boot from the other one and it works. It worked for 
> Grub-0.9 as well.

Regards,
/Karl Hammar

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