Installing on a Raid0 Array Issues

[@xi0m]

I'm trying to install Ubuntu 7.10 on a Raid0 array consisting of two empty 500GB SeaGate drives and it's been a complete nightmare. I'm using this guide: http://ubuntuforums.org/showthread.php?t=630644

I'm able to successfully install dmraid and list my array.

ubuntu@ubuntu:~$ sudo dmraid -r
/dev/sda: nvidia, "nvidia_bdcfcchd", stripe, ok, 976773166 sectors, data@ 0
/dev/sdb: nvidia, "nvidia_bdcfcchd", stripe, ok, 976773166 sectors, data@ 0

Now, when I try to create my partitions, I end up with...

ubuntu@ubuntu:~$ sudo fdisk /dev/mapper/nvidia_bdcfcchd

Unable to open /dev/mapper/nvidia_bdcfcchd

I had previously tried to use this guide using the alternate install CD: https://help.ubuntu.com/community/In...n/SoftwareRAID
I was able to create all my partitions and install Ubuntu but the installation would fail when I tried to install GRUB.

[Pumalite]

Have you read this?:
https://help.ubuntu.com/community/FakeRaidHowto

[@xi0m]

Have you read this?:
https://help.ubuntu.com/community/FakeRaidHowto

I did and I run into the exact same issue.

ubuntu@ubuntu:~$ sudo fdisk /dev/mapper/nvidia_bdcfcchd

Unable to open /dev/mapper/nvidia_bdcfcchd

The only file located within /dev/mapper/ is a file called 'control'.

[Pumalite]

Maybe this would help:
http://www.ubuntu-in.org/wiki/SATA_RAID_Howto

[@xi0m]

Maybe this would help:
http://www.ubuntu-in.org/wiki/SATA_RAID_Howto

No dice. It appears that only dmraid can see my array. gParted and fdisk cannot for some reason.