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 Post subject: Samsung HM500LI
PostPosted: September 6th, 2018, 20:46 
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Joined: March 24th, 2010, 21:08
Posts: 82
Location: California
Trying to recover data from a Samsung HM500LI drive that was removed from a Lacie Rugged enclosure. The usb port had broken off the interface board. Pulled the drive out and hooked it up to test, it did not respond or identify and got very hot. Removed the PCB and found a chip underneath had burned. In photo below it is circled in red.

I'd like to try a PCB swap with ROM transfer but where is ROM chip on this model?


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 Post subject: Re: Samsung HM500LI
PostPosted: September 6th, 2018, 23:34 
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Joined: September 8th, 2009, 18:21
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Location: Australia
The "chip" is actually a coil.

The MCU appears to have embedded flash.

Is there a burn mark on the MCU? Is the Vcore test point shorted to ground?


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 Post subject: Re: Samsung HM500LI
PostPosted: September 7th, 2018, 2:18 
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Joined: November 29th, 2006, 10:08
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Location: UK
I’d say that MCU is toast, so this PCB isn’t realistically repairable.

As fzabkar says, there is embedded flash (I.e. no external ROM chip to transfer).

Luckily these drives don’t have “adaptive” data in the flash, so if you can find a PCB with exactly the same FW (firmware) version you should be good to go, assuming the preamp isn’t cooked.

The problem is finding a suitable PCB, with right FW version.

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 Post subject: Re: Samsung HM500LI
PostPosted: September 7th, 2018, 12:09 
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I checked the MCU under microscope and it is definitely burned as well. So I will look for a donor board with matching firmware. Thanks as always.


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 Post subject: Re: Samsung HM500LI
PostPosted: September 7th, 2018, 15:10 
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Location: UK
Sometimes the label shows the FW version.

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 Post subject: Re: Samsung HM500LI
PostPosted: September 7th, 2018, 23:22 
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Hmm, firmware is not marked on the drive label. With a dead PCB I guess I'd have to just try and match date as closely as possible and hope to get a matching firmware?


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 Post subject: Re: Samsung HM500LI
PostPosted: September 7th, 2018, 23:44 
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Joined: March 24th, 2010, 21:08
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Location: California
Label pic


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 Post subject: Re: Samsung HM500LI
PostPosted: October 1st, 2018, 17:39 
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Joined: December 19th, 2006, 8:49
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Location: Portugal
You can still adapt a PCB if you have Samsung firmware tools ---

Hot swap a drive of the same family/model/firmware and write overlay of the donor to patient, swap PCB to patient and you are good to go ...

Or write ROM code on PCB from firmware database one by one untill you find one that does work ...

etc etc ...

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