Hi, my HDD is Seagate ST500DM002. It sounds like it's spinnig normally but not detecting in both bios or disk management. Its PCB also looks like normal in both sides (no physical damage).

I've tried to change its PCB with same drive but no success. The donor drive's PCB is "100535704 Rev C" but mine is "100535704 Rev D". I wonder that what is my chance if I found the identical PCB with same Rev? or is there any other way that I can try? Thank you in advance.

can you upload the terminal log (original PCB connected to HDA) ?

Sorry but how can I get the terminal log from PCB?

@OP, you can't just cold swap these PCBs they have an adaptive ROM so even if it's a perfect match it'll still never work. With this particular model I'd say it's about a 0.01% chance that it's a PCB problem. Most likely it's failed read/write heads or a firmware issue likely relate to the media cache.

You'll definitely want to seek out pro help on this one. Not a model you want to attempt anything DIY.

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Data Medics - Hard Drive, SSD, and RAID Data Recovery Service Company

Thank you guys for your help... I'm going to send it to the professional data recovery firm today.

Hope to get my data back

regards

we are in Istanbul and will be glad to take a look if you are interested.

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RAID/Server Recovery

Dear Friend Data Medics.

Your Are Right Agree With you DM is not for DIY.

Yours Friend
Jignesh Pankhania

Believe it or not I am getting better with them. I won't say I like them yet, but given the quantity showing up I'm getting pretty familiar with their symptoms.

In the OPs case I'd suspect it's a media cache issue, bad G-list, or other FW bug and should be easy enough to fix using the right bag of tricks.

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Data Medics - Hard Drive, SSD, and RAID Data Recovery Service Company

We too have pretty much got the hang of these things, ones with serious physical issues I mean. We have always managed to recover ones with FW issues fairly easily.

The first thing we do is to remove the heads assembly (using Nikolas excellent head tool!) and microscopically examine the head sliders for debris, then then you have a pretty good idea what's gone on. Usually one or two heads are pretty grubby

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PC Image Data Recovery
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Could that be because modern drives no longer park their heads on the platters?

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A backup a day keeps DR away.

More likely they've gathered debris/residue from a head touching a platter at some point.

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PC Image Data Recovery
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New!! HDD-PCB.COM for all your PCB and donor HDD requirements!

Yes, of course, but I'm thinking that such debris would be dislodged if the heads were to park on the platter instead of on a ramp. Hence older drives may be less likely to be affected by head contamination than newer ones.

_________________
A backup a day keeps DR away.

Six of one and half a dozen of the other to be honest IMHO.

Only today we've seen two 250gb Seagate slim desktops with huge scratching to the landing zone which has caused fine debris to be flung outwards, covering the platter surface in a fine dust. Other than the landing zone damage, the platter "looks" pretty much OK.

We can only speculate on what's occurred, but my guess is that a small amount of debris has got stuck to the head and has caused excessive and destructive abrasion while the device has been idling with heads over the landing zone.

Maybe, just maybe, if the heads were being parked on a ramp the action of the internal air flow coupled with the load/unload procedure may have dislodged the debris?

_________________
PC Image Data Recovery
http://www.pcimage.co.uk

New!! HDD-PCB.COM for all your PCB and donor HDD requirements!