New Lacie Rugged Thunderbolt External Drive won't mount on Macbook Pro 8,1

I've searched, and am coming up empty handed. Any help would be appreciated.
So I own a late 2011 Macbook Pro 8,1. that's running version 10.9.5.
I bought a brand new Lacie Rugged Thunderbolt External HD that won't mount via Thunderbolt, though it works fine with the USB. Any ideas as to why the Thunderbolt connection isn't working?

Silly question, but - did the drive come with a Thunderbolt cable or did you purchase one with the drive?
Call back...
Clinton
MacBook Pro (15-inch Late 2011), OS X Mavericks 10.9.5, 16GB Crucial RAM, Crucial M500 960GB SSD, 27” Apple Thunderbolt Display

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    journeled: no
    disk utility is the only place I can see the drive appear. I don't Have the ability at the moment to connect the drive to a windows pc. I have also tried using disk utilities repair and erase options with no luck. I have tried using terminal and activity monitor several times as previously mentioned in this thread but again no luck but may have missed understood the directions.
    I would simple reformat the drive but suspect because it's greyed out its why I can't.
    any help or directions would be great?
    thanks for your time and knowledge.

    Read all the threads on this.  I am similar to Phoenix86.  I force quit fsck_hfs a few times when I started the bad drive but that did not prompt anything in finder. Currently I am imaging the drive to see if that gives me access to my files on the external.  Last night I did a restore, but the (brand new) drive it saved to behaves just like the bad one that disk utilities so still can't access the files since that one won't mount either.  I also tried a few things in terminal that someone else suggested, but like this repair:
    fsck_hfs -r /dev/disk2s3
    ** /dev/rdisk2s3 (NO WRITE)
    Can't open /dev/rdisk2s3: Permission denied
    I don't know what to do with this message... 
    I feel so stupid, like the files are right there, but I can't get to them to copy them over.  I can hear the disc spin, and it can eject from disk utility, can't open, not even in volumes directory. 

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