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 Post subject: Hitachi HDD turns off when accessed after bad power supply
PostPosted: September 4th, 2019, 19:08 
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Joined: September 4th, 2019, 18:52
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Location: United Kingdom
I have a Hitachi H3D10003272S (P/N 0F10383) that got some unfortunate voltages on the SATA power.
I got a modular power supply but used the wrong kind of lead to supply SATA power, leading to the power supply shutting off (presumably short circuit protection). After swapping out cables, my two other drives are working well but this one is inaccessible.
It will spin up and stay spinning until some kind of access. In the case of booting up to Windows, that happened just after log-on. In a HDD dock, it shuts off immediately. The BIOS can see the drive and its capacity.
After shutting off, the drive doesn't appear to the BIOS, device manager, etc.

Any ideas for recovery? Can this drive have its PCB swapped?
Thanks


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 Post subject: Re: Hitachi HDD turns off when accessed after bad power supp
PostPosted: September 4th, 2019, 19:23 
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Joined: September 8th, 2009, 18:21
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Measure the TVS diodes and adjacent R100 resistors:

https://forum.hddguru.com/viewtopic.php?t=37644

ISTM that the 5V TVS diode probably sustained an overvoltage. The usual result is that the resistor goes open circuit, and this in turn enables the overvoltage to strike the motor controller IC and the preamp on the headstack.

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 Post subject: Re: Hitachi HDD turns off when accessed after bad power supp
PostPosted: September 4th, 2019, 19:43 
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fzabkar wrote:
Measure the TVS diodes and adjacent R100 resistors:

https://forum.hddguru.com/viewtopic.php?t=37644

ISTM that the 5V TVS diode probably sustained an overvoltage. The usual result is that the resistor goes open circuit, and this in turn enables the overvoltage to strike the motor controller IC and the preamp on the headstack.


Diodes may be okay. 12V one had a very low voltage drop (.12) but that could be due to in-circuit measurement
The 1 ohm resistor on the 5V TVS is open-circuit. So the 5V rail got either negative voltage or overvoltage.


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 Post subject: Re: Hitachi HDD turns off when accessed after bad power supp
PostPosted: September 4th, 2019, 19:48 
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I suspect that the preamp is damaged. Not a DIY job, sorry. :-(

If you would like to completely rule out the PCB, then you will need to transfer the 8-pin chip at the bottom right corner of the LSI MCU to a replacement PCB.

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 Post subject: Re: Hitachi HDD turns off when accessed after bad power supp
PostPosted: September 4th, 2019, 21:35 
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Joined: September 4th, 2019, 18:52
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If it's not the PCB and it's the headstack, would the drive require a swap from one of the same model?
My data isn't critical, only desirable. Unless data recovery is way cheap these days, I don't think I'm going to go professional.


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 Post subject: Re: Hitachi HDD turns off when accessed after bad power supp
PostPosted: September 5th, 2019, 2:04 
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Prehistoricman wrote:
If it's not the PCB and it's the headstack, would the drive require a swap from one of the same model?

Not always, but there are rules for headstack matching which often preclude random swaps, even if the models are identical.

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 Post subject: Re: Hitachi HDD turns off when accessed after bad power supp
PostPosted: September 11th, 2019, 15:28 
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I was getting ready to build a makeshift clean air station box and I'd just got a drive from eBay. Unfortunately the model wasn't the same as was in the images but it did make me look through my spare drive collection. I found a 160GB hitachi with the same PCB as my broken drive.
I swapped the PCB and flash chip and the drive works again!
So it looks like the LSI 'MUSE' drive chip became faulty.


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