If you need to partition a disk that's > 2TB then you need to use something that understands a GPT partition table. Currently that means parted or gdisk but not fdisk. You'll need a pa... [by TrevorH]
First I create a properly aligned partition in a new GPT table using parted by specifying percentages for start and end of the partition:
# parted -a optimal /dev/sdb
GNU Parted 2.3
Welcome to GNU Parted! Type 'help' to view a list of commands.
(parted) mktable gpt
Warning: The existing disk label on /dev/sdb will be destroyed and all data on this disk will be lost.