RAID10 not working in install

[Brian Chadwick]

Bill Davidsen wrote:
> I was doing a new install (reinstall) of FC8 Unity and when I tried to 
> configure the disks and partitions I put a software RAID partition on 
> one drive, and another of the same size on the other drive, and then 
> told the installer to make them RAID10. I got back a message that at 
> least four drives are needed for RAID10.
>
> I then booted a rescue disk, created the array with mdadm, and went 
> back to the install. Very manual, and not the type of thing many 
> people would be comfortable doing. Does work, though.
>
> So the question is, what is the installer trying to tell me? By any 
> chance did someone not understand that RAID10 and RAID1+0 are totally 
> different things? Or what.
>
> Good news: for the very first time the network install worked, which 
> it very much didn't using the original FC8 DVD+install CD "back when." 
> I used NFS mount, I suppose I'll try HTTP at some point, but for now 
> I'm happy that something worked.
>
my understanding of RAID 10 is that its a mirrored array of striped 
disks. Hence 4 disks, well at least 4 partitions, required.