RAID10 on Debian (or RAID0 on top of RAID1) - possible?

[Tomasz Chmielewski <mangoo@wpkg.org>]

I wanted to install a Debian system on RAID-10, on 4 disks.
Unfortunately, it seems that Debian installer only supports RAID0, RAID1 
and RAID5.

As RAID-10 is technically RAID-0 on top of RAID-1s, I tried such a scenario:

    -----R0-----
    |          |
   R1          R1
 |    |      |    |
HDD1 HDD2  HDD3 HDD4

Unfortunately, Debian installer is also unable to create such a setup - 
it seems that it can't create RAID devices on existing RAID devices 
(i.e., RAID-0 on RAID-1).


How can I set up RAID-10 (or RAID-0 on top of RAID-1) using the Debian 
installer?


--
Tomasz Chmielewski