Comment 33 for bug 527401

I did it manually, using ext4, first on raid1 (2 active + 1 spare), which failed to boot, after
several attempts. Rescue would not help.

Then I destructed raid1 and manually (see above) grub-installed on /sda1, /sdb1, sdc1.
Doing the same with raid1 does not worth the time to load a bunch of modules.

Besides, the installer refused to build a RAID0 of 2.7TB out of 3 900GB partitions
(table too big, see above).

As I said, I did not believe it. I easily did it using a simple mdadm --create after installation.

Rewrite from scratch