Cannot find partition in Disk Utility

I want to partition my LaCie external hard drive. On-line guide indicate it is done from within Disk Utility. But my only options are First Aid, Erase, and Restore. How do I partition?

1GB is sufficient for a Mac OS X Lion Recovery partition.  You will need a larger partition for Mountain Lion.
Select the Drive on the left
Select the Partition Tab on the right
Select the number of partitions you wish to create under "Partition Layout:"
Click on each partition and give it a size and an name if you like
The "Options" button should be at the bottom of the partition layout display next to the [+][-] buttons.
Select GUID in the options
Apply the changes
Now using the Apple Recovery Disk Assistant you should be able to put a recovery partition on your flash drive.

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       0:              GUID_partition_scheme                        *120.0 GB     disk0
       1:                                           EFI                         209.7 MB     disk0s1
       2:                         Apple_HFS Macintosh HD            78.5 GB     disk0s2
       3:                       Apple_Boot Recovery HD             650.0 MB     disk0s3
       4:                   Microsoft Basic Data                         31.7 GB      disk0s4  
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              0          1                             MBR
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      153649656    1269544     3            GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
      154919200   17628896        
      172548096   61892608    4            GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7
      234440704        911        
      234441615         32                       Sec GPT table
      234441647          1                        Sec GPT header
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    3: 00    0   0   0 -    0   0   0 [         0 -          0] unused     
    4: 00    0   0   0 -    0   0   0 [         0 -          0] unused  
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      BSD: not present
      APM: not present
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    Recovery/transformation command (? for help): h
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    Creating entry for GPT partition #4 (MBR partition #2)
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    Set the bootable flag? (Y/N): y
    Unused partition space(s) found. Use one to protect more partitions? (Y/N): n
    Recovery/transformation command (? for help): o
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    MBR disk identifier: "DELETED INFO"
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       1                               1    172548095   primary     0xEE
       2           *     172548096    234440703   primary     0x07
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    Warning: Devices opened with shared lock will not have their
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    Warning: The kernel may continue to use old or deleted partitions.
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