Bug#574521: support automatic installation on software raid1

[Petter Reinholdtsen <pere@hungry.com>]

[Holger Levsen]
> it would be great if one could use automatic partitioning for
> software raid1 setups. Ideally it would just detect that there are
> two identical sized disks and just set it up.

If someone can come up with ideas on how to detect two identical disks
within d-i, and how to preseed d-i/partman to set up software raid,
the rest should be small matter of programming in
debian-edu-profile. :)

Perhaps /proc/partitions can be used to detect identical disks?

Happy hacking,
-- 
Petter Reinholdtsen