Hi All

Hitachi/Toshiba 3tb SATA HDD
Model DT01ACA300
Board 0A90380

Hoping for some advice on 5 Toshiba (Hitachi) drives that received 12v overvoltage on the +5V supply due to an error in cabling. As this is for a personal NAS, they cant afford sending to a data recovery company so I was asked to have a look. Form my basic check the 5v TVS diode and fuse link have cut the 5v supply as its designed to do. There are no obvious chip failures/burns however the drive does not spin up with no voltage readings on the motor. I have done the basic checks based on viewtopic.php?f=11&t=36362&p=255256&hilit=toshiba+tvs#p255256 to confirm the failures, however I have hit the limit of my skills and don't want to risk anything else, so have purchase a replacement board from hddparts and sent the original to have its firmware copied.

I was wondering what other people success has been, I have seen a few issues like this occur on the forum and assume that as long as the heads - preamp/motor is ok, the drive will come back up once the board is replaced? Are there any other basic checks you can suggest. Do the Hitachi/Toshiba tend to survive these events with the TVS taking the hit? We also have some working drives (same model) from this server that are spares with no data, is it worth swapping boards to see if drive spins up at least, or does that not work?

Finally if a data recovery company does become involved, are there issues when the data having to be extracted as a disk image, as its part of a ZFS raidz array and not individual files on a readable partition.

Thanks

I think the 12V TVS is burned (examine it).
Remove it (or short) and it should work

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odzyskiwanie danych z dysku

Why would you replace a shorted TVS diode with a short circuit?

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A backup a day keeps DR away.

good point
my mistake

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odzyskiwanie danych z dysku

Hi thanks. Confirmed the 5v TVS and resister has failed, removed TVS and bypassed link but still did not power up, as I am not sure of the voltage test points, will order a new board and compare.

Cheers

No, you're just supposed to remove the TVS, not "bypass" it. That was misinformation you were given. There should be nothing where the TVS once was.

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

The OP states ...

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A backup a day keeps DR away.

Should have stated that a bit clearer.

1. Removed 5v TVS diode.
2. Removed and bypassed 0 ohm resister.

Anyway, as we had a few failures, getting a board replaced on one of the drives, then can compare voltages.


Cheers