When in YaST/System/Partitioner I try to create RAID for my second HDD which is named "sdb".
My original "sda" hdd is partitioned as follows:
dev/sda, disk type
dev/sda1, linux swap, swap, swap
dev/sda2, linux native, ext3, /
dev/sda3, linux native, ext3, /home
I recently added a new 3TB hard drive to a headless media server (HP proliant microserver) running Ubuntu server 12.04. I followed this tutorial, which uses fdisk to create a single partition of the maximum sixe reported by fdisk. I have choosen ext4 format. I then copied across all my media, which took some time.