# fdisk -l /dev/sda

Disk /dev/sda: 101.8 GB, 101860769792 bytes
255 heads, 63 sectors/track, 12383 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          13      104391   83  Linux
/dev/sda2              14       12383    99362025   8e  Linux LVM

# parted  /dev/sda  print

Disk geometry for /dev/sda: 0.000-97142.000 megabytes
Disk label type: msdos
Minor    Start       End     Type      Filesystem  Flags
1          0.031    101.975  primary   ext3        boot
2        101.975  97135.202  primary               lvm
Information: Don't forget to update /etc/fstab, if necessary.             

From the output of parted you can see that the system drive has a msdos disk label -- that's good for the system drive, but NOT what you want for your data drive.
Your data drive should look somewhat like this -- all empty: 

# parted  /dev/sdb  print

Disk geometry for /dev/sdb: 0.000-4194614.000 megabytes
Disk label type: none
Minor    Start       End     Filesystem  Name                  Flags

Please note that "parted" uses Megabytes for the partition boundaries, and not cylinders. 

run parted interactively on your new, and empty data drive, e.g. /dev/sdb, 
and create a GPT Disk Label, then specify one partition using the size of your drive in Megabytes from the "disk geometry" listing:

# parted
(parted) mklabel gpt

(parted) print
Disk geometry for /dev/sdb: 0.000-4194614.000 megabytes
Disk label type: gpt
Minor    Start       End     Filesystem  Name                  Flags

(parted) mkpart primary ext3 0 4194614

(parted) print
Disk geometry for /dev/sdb: 0.000-4194614.000 megabytes
Disk label type: gpt
Minor    Start       End     Filesystem  Name                  Flags
1          1.000 4194613.983  ext3                              
Information: Don't forget to update /etc/fstab, if necessary.             

(parted) quit
#

create your filesystem on /dev/sdb1
If you are using an ext3 file system, I recommend to use the option -m0 to not reserve the standard 5% space for root -- no reason to waste that space.

# mkfs.ext3 -m0 /dev/sdb1

# mkdir /data
# mount -t ext3 /dev/sdb1 /data

# df -h /data
Filesystem            Size  Used Avail Use% Mounted on
/dev/sdb1             3.9T  195M  3.9T   1% /data

make the appropriate entry in your /etc/fstab to mount /dev/sdb1 as ext3 on /data using "e2label"