I had a RAID 1 setup using by bios. Ubuntu was installed on the RAID array. I now want to move to a software raid using mdadm. I have deactivated the RAID 1 in the bios. I copied the operating system to a separate drive. I now want to create a RAID 5 with 3 disks. 2 of the 3 disks was previously in the fakeraid. Fdisk still shows the fakeraid and has somehow marked the raid as active.