Comment 46 for bug 568050

Well guys, I got this to work a somewhat different way as I'm using Ubuntu Server. If you can get your hands on a 9.10 server cd, use it to start an install. Once you get to the part where it detects your raid, activate it, and setup your partitions however you like, and then apply your changes. Unlike the red screen you get with the message (can't create a filesystem) in 10.04, 9.10 will successfully create your partitions. After your disk has been partitioned and formatted, stop the 9.10 install.

Now reboot, and start the install with the 10.04 server cd. Again, once you get to the part where it detects your raid, activate it. You'll see the partitions you created before. Reassign their mount points, and format them again if you like. After I did this my install of 10.04 was successful using my fakeraid. However, the installer didn't install grub on my second hard drive. This was a simple fix by simply issuing the command sudo grub-install /dev/sdb for my particular setup. I hope this helps someone who's trying to install Ubuntu Server 10.04 on a fakeraid setup.

I did test by powering the machine off and removing power to one hard drive and then the other to verify it would boot to both, and it was successful.