Am 27.05.2011 18:54, schrieb Maxim Vorontsov:
> Hello.
> 
> I look how to create a RAID10. I understood correctly I must first
> create two RAID0 device for one RAID1? Or is simple command for
> creation RAID10 on 4 disks?
> 
> I dont find answer for this on gentoo.org or raid.wiki.kernel.org.
> --
> Brgds
> Maxim Vorontsov
> 

I assume you want a software RAID (constructed with mdadm)? In that
case, you can create a RAID10 in a single step like this:
mdadm --create /dev/md0 --level=raid10 --raid-devices=4 /dev/sda
/dev/sdb /dev/sdc /dev/sdd

Hope this helps,
Florian Philipp