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External storage options by Seagate, usually connected by USB, available in many storage sizes and form factors.

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HDD disappears after connecting to Laptop


I dropped my extrenal HDD to floor yesterday and since then it stopped working. It is a 1TB seagates HDD. I checked the blue light which is suppose to be stable but since the drop it is blinking. I tried to connect it with my desktop still the same. Tried to change the cable and it is still the same. When i connect the HDD to PC i hear USB connection sound on PC, it appears on Device manager then within seconds it disappears. I opened the external casing and removed the HDD, replace the USB chip with another HDD, and it works fine. What could be the problem in this case, is it repair able and can the data be recovered without any loss. I have like 10 yrs of photo collection on this HDD.

Please help...

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@mayer I have already removed the hard disk from the existing enclosure, but instead of testing it in a new enclosure, I did quite opposite. I tried to check my existing enclosure of Seagate with an old hard disk from laptop and it worked. So it seems something is wrong with the hard disk.

@thomask Well yes that's what I did. I removed the hard disk from the external enclosure and replaced the hard disk with another laptop hard disk that was lying around. There is no issue, the hard disk is getting detected.

With respect to hard disk spinning, I don't feel anything. it seems as if there is power to it. I tried to run seatools but all I could notice in the hard disk listed are my Laptops internal hard disk.


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Remove the hard drive and try it in an external enclosure. You can then tell if the problem is with the drive or the old enclosure.


some things you can get drive to boot up one last time from recovery purposes, but tapping it with a small jewelers hammer. Have a st up ready to recover to and go after your more important stuff first.

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You've run down a few trouble shooting steps I would have done on most hard drives, internal and external.

However, I am not sure what you mean by 'replaced the USB chip with another HDD'. The HDD is not a USB chip.

If you mean you replaced the internal HDD unit in the external enclosure with another HDD unit, then the answer seems evident enough.

What you have done seems to rule out a damaged connector, damaged power jack, damaged cables (Its not impossible however it IS highly improbable at this point).

When you have the 'damaged' HDD in the enclosure does the drive 'feel' like it is spinning up? You can generally feel/sense a resonance hum the platters inside spin/spin up. If you lifted the enclosure (not really suggested) you might also feel a slight shift in the enclosure, especially when you start it up.

Without running seatools diagnostics on it, or another HDD tool, it's hard to tell past the fact I'm betting you have damaged the actual drive itself.

I tell many customers, a hard drive is like a record player (if you remember those things), and trying to run with it, or drop it while its running is not conducive to its health. Double so for the hard drive as it has 'heads' which you risk bashing against the 'disks' or 'records' which hold your precious data.

I can only assume you've fubared the internals somehow when it was dropped.

Note: if the old drive spins, you have a chance at repair/recovery of data at a reasonable cost, if it is NOT spinning, you could be looking at over $300-600 for a 'clean room' recovery.

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Raghu Vamsi Kodaboina sera éternellement reconnaissant.
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