I am trying to find my external HDD UUID in Mountain Lion but diskutil info /dev/disk1s1 returns:

Najis-MacBook-Air:~ ****$ diskutil info disk1s1
   Device Identifier:        disk1s1
   Device Node:              /dev/disk1s1
   Part of Whole:            disk1
   Device / Media Name:      Untitled 1

   Volume Name:              My Book
   Escaped with Unicode:     My%FF%FE%20%00Book

   Mounted:                  Yes
   Mount Point:              /Volumes/My Book
   Escaped with Unicode:     /Volumes/My%FF%FE%20%00Book

   File System Personality:  NTFS
   Type (Bundle):            ntfs
   Name (User Visible):      Windows NT File System (NTFS)

   Partition Type:           Windows_NTFS
   OS Can Be Installed:      No
   Media Type:               Generic
   Protocol:                 USB
   SMART Status:             Not Supported

   Total Size:               2.0 TB (2000364240896 Bytes) (exactly 3906961408 512-Byte-Blocks)
   Volume Free Space:        212.5 GB (212506509312 Bytes) (exactly 415051776 512-Byte-Blocks)
   Device Block Size:        512 Bytes

   Read-Only Media:          No
   Read-Only Volume:         Yes
   Ejectable:                Yes

   Whole:                    No
   Internal:                 No

And there is no UUID. What is wrong exactly?

Thank you.