External hard drive nightmare

Hi all, first time posting but this site has helped me several times in the past so thank you for that,
Having an absolute nightmare with an external drive. I've got a Hitachi Touro Pro 4TB USB 3.0 that recently had some trouble with the power supply, over the last couple days the hard drive wouldn't power on if the power cable was hanging the wrong way off of the plug (if that makes sense), haven't had time to get a new power supply so have been dealing with it the last couple of days until I can get a new one.
Suddenly my hard drive stopped showing up in Finder, I checked Disk Utility and it's still there. The actual hard drive model and, stemming down from it, "EYES DRIVE" (which is what I named the drive) are both still there, but the EYES DRIVE is greyed out. I've tried verify disk which lead to a warning saying it needed repairing, but when I try to repair it I'm told the disk cannot be repaired and to backup any files and restore the drive. It also won't let me mount from that menu.
I've tried booting up to the Disk Utility menu and repairing from there to no avail, also tried DiskWarrior which tells me there's a hardware issue with the drive, I get the error "Directory cannot be rebuilt due to disk hardware failure (-36 2738)". I'm currently doing a surface scan on it with TechTool Pro, but it's a 4TB drive and this is proving to be taking a very long time. No bad blocks encountered so far but I'm only 15,000,000 blocks into a 976,000,000 block hard drive.
What are my options here? The data on the drive is extremely valuable and I cannot really afford to lose it. Is it a good sign that the drive name still shows up in Disk Utility or am I still in big trouble?
Also, I realise I should have multiple backups of all of my stuff, but this drive originally started off as a backup drive that I would keep safe and not touch except for backups, until I got a new retina MacBook Pro and the lack of space on it (256GB) forced me to use it as storage as well as Time Machine backups. There's about 5 years of hard work on it, I'm absolutely kicking myself that I didn't have it backed up elsewhere.
Thank you for any responses and let me know if you need any more info, I'm really freaking out here!

Managed to find a solution of sorts for anyone suffering from the same problem,
It turns out I was unable to access the drive at all because of my MacBook trying to fix the drive before letting me use it, I stopped this by killing the process "fsck_hfs" in activity monitor, an error came up saying I was unable to repair the drive but I was then able to mount the drive as read only and all of my data was still there, ready to be copied onto another drive.
I tried DiskWarrior immediately after this to try and repair the drive but it put me back to square one (with the drive not showing up and the "fsck_hfs" process running again), so it looks like the hard drive itself is a lost cause, but the data is saveable. I don't think I've ever been this relieved in my life, hope this helps someone else!

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fzgy wrote:
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Hello All!
I am so excited about my new computer and I didn't know that my external hard drive had so many pictures duplicated on it. So I downloaded the entire hard drive. I thought iPhoto was going to be my answer, and now after reading a lot of discussions, it seems I have royally screwed up. Please help me fix this problem. I am a computer novice. An even more Mac novice. I need very simple directions. I would just start over with iPhoto, but I downloaded my digital camera with brand new photos on iPhoto and also downloaded my digital camera software on my new MacBookPro. I am afraid if I "start over" with iPhoto I will lose my digital camera pictures. I bought the Mac to finally get my pictures straight, and look at the mess I have made. I had AVG PC cleanup and used that program last night to delete duplicates from my PC. I also used it to delete duplicates from my external hard drive. I omega. I know, I know, too late huh? But I am teachable. And I now have my external hard drive fixed. But now, my question to the community is how to fix my new Mac, and my iPhoto.
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SweetThunder73 wrote:
When you say to remove the photos out of the iPhoto folder, then import the clean single copies, I am understanding that the "original" file that the decloner was run against is now the "clean" single copies?
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You want all the duplicates out, but it will take you ages to do it by hand.
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7: Open iPhoto and remove all your pictures in there. The iPhoto Library will update to become empty.
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9: Open your New Folder, from the Edit menu > Select All and
10 From the Finder > File Menu > Open With > Preview.
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First question, since you made
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SATA bridge card as found inside all USB HD devices which has an extremely high failure rate.
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