My macbookpro (2.4 GHZ Intel Core i5, DDR3, OSX 10.9.4), stopped recognizing my Seagate external drive out of the blue. Help!

Hello,
I accidentally unplugged my 2TB Seagate external drive, and when I pugged it back on, my Mac was still recognizing it, however, when I tried to access its contents, the folders appeared empty, so I tried to eject the drive, but the icon on the desktop was gone, I unplugged it, restarted my Mac, and it did not recognize the external drive. Then I repeated the stunt at lest three times. I thought the drive was ruined, so I got a laptop that runs Ubuntu, and Ubuntu recognizes and displays the contents correctly, which makes me think the external drive is fine. Any ideas on what to do? I mean my Mac won't even acknowledge the drive at all, otherwise I would think about re-formatting. Any ideas, I'd much appreciate it. Thank you.

Hello,
I accidentally unplugged my 2TB Seagate external drive, and when I pugged it back on, my Mac was still recognizing it, however, when I tried to access its contents, the folders appeared empty, so I tried to eject the drive, but the icon on the desktop was gone, I unplugged it, restarted my Mac, and it did not recognize the external drive. Then I repeated the stunt at lest three times. I thought the drive was ruined, so I got a laptop that runs Ubuntu, and Ubuntu recognizes and displays the contents correctly, which makes me think the external drive is fine. Any ideas on what to do? I mean my Mac won't even acknowledge the drive at all, otherwise I would think about re-formatting. Any ideas, I'd much appreciate it. Thank you.

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