By default, you can not create a ext3 partition that is larger than 2TB. Getting around this road block however is quite simple, first you need to install parted which will allow you to make that large partition.
# apt-get install parted</p>
Now we just need to run parted and create the partition, in my example below I show XFS as the file system, but you could use ext3 or jfs or reiserfs etc.
parted /dev/sdb<br/>
(parted) mklabel gpt<br/>
(parted) print<br/>
(parted) mkpart primary xfs 0 <strong>X</strong> <em>(Where X is the number returned in the print command IE 1000GB)</em><br/>
(parted) quit<br/></p>
Now, just format it, again I used XFS but you can modify this with your partitioning scheme.
# mkfs.xfs /dev/sbd1</p>