Hard Drive damaged by electric shock

[NoQuarter_]

few days ago I learned that cables for modular PSU aren't standardized....

so, +5v went trough the black wire destroying two hard drives, dvd drive, secondary GPU, mobo and finally PSU died it self, all in matter of 3-4 seconds

I have some very very important data on one hard drive and I'd like to rescue it, I'm not really a stranger to electronics, I watched some videos of how to do it and I plan to do it but I could use some questions answered before

first, what kind of damage can I expect?
I assume it is the circuitry board that died, hard drive spins, no strange noises, no clicking, head makes a noise like it tries to read something and gives up, just like normal drive when you start it. Bios does not register the drive. Next doubt would be the head

second, I think I've found a decent donor, if someone could confirm it it would be nice, it is not too expensive but you saw the list of things that died in my PC...

anyway, here is my hard drive
http://imgur.com/oBmy9p2

here is the best donor
https://www.kupujemprodajem.com/big-photo-35110271-1.htm

to save you the trouble, date codes show end of november and end of december, the difference is just under a month

any tips are appreciated

edit: I forgot to take a picture, numbers on circuitry board match, the number and the revB, but those numbers near connector don't really match

 

[weberdarren97]

Are you planning on taking out the platters and putting them in the other drives? Unless all numbers match, I cannot guarantee that this will be successful. Please note that simply touching the platter destroys all the data where you touched it.

Also, please just send in the drive to be rescued. It's expensive, but if your data is valuable then it may be worth it.

I know that I have about $25,000 worth of client data on my other machine. Of course it's backed up weekly. But if I didn't have a backup and my drive failed, I'd be willing to pay someone a rather large sum to get me my data back.

Dude you killed a Barracuda... Those things are tough to kill

 

[reedo_43]

These days the same board just will not work. You will need the eprom or bios off of the original.

http://www.donordrives.com/pcb-replacement-guide

 

[Solandri]

Hard drive electronics have a diode (or two) which act as fuses in the event of a voltage spike. They will blow first, protecting the rest of the electronics. If they worked successfully, you don't even need to do a board swap - you just need to remove the diode (thus removing the short) to power up the board again.

http://lifehacker.com/5982339/diy-data-recovery-tricks-for-when-your-hard-drive-goes-belly-up

That said, I'm not sure if this fuse will protect you from putting voltage on the ground (black) wire. I'd suggest talking to a hard drive recovery company. Explain what happened, and that you're proficient at repairing electronics, and if this is something which could be fix by just removing the diode(s).

 

[NoQuarter_]

I was planning to switch parts one by one from donor drive to mine and see what happens

rescue center in not really an option, data is not as valuable as it is of personal value.
only valuable data barely covers the costs for donor drive and I live in Serbia where for data recovery I'd have to give my next 3-6 paychecks.
And I already spent a lot to replace dead parts

I was hoping to avoid replacing eprom or bios, was hoping that less than month apart would do the trick

and WOW, actually one diode is showing 0 ohms in one direction, other diode does give some resistance, can't tell exactly how much cause I borrowed my digital multimeter and I'm left with 35-year old analog one that uses the same 1.5v AA battery for nearly two decades

main problem is that my drive spins and if I got it right that should happen if diode is dead, I mean it could be the case if this is the one used for 5v and motor uses 12v

guide says just removing the diode should help so I guess I should try that before buying this