Does anyone know of an easy to use GUI Raid Partitioning Software.
The Procedure to do it in linux for a novice is so complex.
Yet in the bios of most computers with onboard raid, their software to create a raid set is So Easy.
Or is there an Easy way to Install Linux on an Existing Raid Set Created in the BIOS.
Because if you try and install Linux onto an Existing Raid Set, it all goes well until the the end where it says that the installation was unsucesful.

I'm not aware of any GUI RAID-managing programs; the closest thing I saw in a quick Google search was Webmin-based.

What distro are you using?

If you have a true hardware RAID, then I believe when you setup the RAID there, Linux will see the "assembled" RAID. So for example, if you have 2 disks, and you set them up in your BIOS as a RAID 1 (mirroring), then Linux will only see one "disk" as /dev/sda that will actually be the two disks in the RAID 1.

I've heard a lot about "fake RAID" cards, though, and I'm not sure how to tell the difference between a "real" and a "fake"; but from what I understand the "fake RAID" card is more about having a special driver in Windows than the hardware itself doing the work. If you have a "fake" RAID card, most of the things I've read suggest just going with software RAID and skipping the hardware RAID completely.

That's probably because (1) RAID is complex and (2) not something that a novice is usually faced with — I associate RAID with systems administrators running servers.

Two good starter tutorials, if you need one, is
http://www.dedoimedo.com/computers/linux-raid.html
http://wiki.archlinux.org/index.php/RAID
Unfortunately, you have to skip the example section in the first one on the use of the Ubuntu alternative installation disk, because they've dropped it. The current Ubuntu instructions only refere to the server edition. Probably the best distro for RAID would be Fedora or CentOS, but the installation is not easy.
http://docs.fedoraproject.org/en-US/...llation_Guide/
http://wiki.centos.org/HowTos/Instal...tionable_RAID1
http://wiki.centos.org/HowTos/SoftwareRAIDonCentOS5

Should "just work" as mentioned.
I would be more interested in why it failed. Did the install actually work and (maybe) grub failed ?. Might be simple to fix.