Mine was f4, so I went there tried to break the RAID but it said that there wasn't.
So this means that the disks aren't in RAID correct? Maybe my uncle didn't remember this correctly.
Still my OS just reads one disk, while there are 2 and even the BIOS shows that.
Keep in mind that the one not working, has that problem while booting, which makes me believe that there was someting wrong with the previous Linux install that my uncle had? Though he claimed that it was working fine with him. Maybe this is what is causing the conflict?