I made a stupid mistake! I have an Ubuntu 11.10 and there I have 3x2TB disks in a RAID5 -> 4TB usable. I wanted to install a new 4TB disk in the computer. I opened gparted and created a GPT partition ...
I have an mdadm/lvm2 volume with 4 HDs that I created in Ubuntu 10.04. I just upgraded the computer to Ubuntu 10.10. I redid the mdadm commands to get volume up and running, did mdadm --detail --scan ...
I've got a Gentoo box that I'm interested in switching over to an Ubuntu box. I currently have the partitions laid out using a mixture of RAID (mdadm) and LVM2, as specified in this document . ...