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 Post subject: Samsung HM321HI/SRM board replacement
PostPosted: November 26th, 2018, 20:11 
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Joined: November 26th, 2018, 19:13
Posts: 1
Location: Brazil
Hello, I have a HM321HI/SRM which kind of stopped working. I have years of family pictures on this HD, so I really need to fix it to recover these files.

If I leave the HD powered off for a few hours, when I connect it to the PC, it is possible to read the drive, see folders... just for a few seconds. Then I hear what I think it is the heads parking sound and then drive stops spinning. It is not even recognized by the PC anymore.

I have to wait a few hours, then it happens just like I explained before.

I believe the problem is on the PCB, as I found some oxidized components on the component side.

I have a few questions about this HD:

1. What is the meaning of /SRM on the code? I found several HD to buy on internet - to use as donor -, but their codes ends with /SRN, /SRO, /SRP...

2. Would a board from a HD with code variation as I mentioned above work in my drive?

3. Do I really need to do a BIOS swap? Any chance to find a donor HD which has compatible BIOS?

Additional info: FW 2AJ10001, Rev A, Mercury rev.07 R00, board BF41-00306A 00.

Any help will be highly appreciated.

Thank you.


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 Post subject: Re: Samsung HM321HI/SRM board replacement
PostPosted: November 28th, 2018, 7:45 
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Joined: October 19th, 2010, 13:07
Posts: 8
Location: Bucharest, Romania
You just need to match the board number, it doesn't matter which variation it came from. You will definitely have to swap the ROM chip from your board to the replacement one, it is not possible to get any data if you put a board with a different ROM.


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 Post subject: Re: Samsung HM321HI/SRM board replacement
PostPosted: November 28th, 2018, 9:01 
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Joined: December 19th, 2006, 8:49
Posts: 10528
Location: Portugal
Samsung ROM don't have unique adaptves. As long as you match firmware version + PCB number ROM content should be the same (unless drive firmware was updated) and i should work without moving the ROM chip ...

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 Post subject: Re: Samsung HM321HI/SRM board replacement
PostPosted: November 28th, 2018, 9:16 
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Joined: October 19th, 2010, 13:07
Posts: 8
Location: Bucharest, Romania
Thanks for the clarification, we do not see many Samsung drives here. I would still play safe and swap ROM, it is a simple soldering job, but that's just me. :)


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 Post subject: Re: Samsung HM321HI/SRM board replacement
PostPosted: November 28th, 2018, 9:52 
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Joined: December 19th, 2006, 8:49
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Location: Portugal
It should still be possible to READ the ROM by TTL as the original PCB does looks to be working at least to some level.

Faster and safer than moving the chip.

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 Post subject: Re: Samsung HM321HI/SRM board replacement
PostPosted: January 6th, 2019, 10:34 
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Joined: January 6th, 2019, 5:25
Posts: 2
Location: Germany
Hi,

During my research in hope to retrieve my data from a faulty hard drive I found this interesting forum and I'm happy to join the community :)

I also have issues with a Samsung HM321HI drive, which is not working anymore. When I connected it to my PC over SATA, it wasn't recognized in BIOS at all and also the motor wasn't running (no noises at all). As some contacts on the board looked oxidated, I decided to buy a new PCB with the same revision and board number and replaced it with the original PCB. When I connect the hard drive now, I hear the motor spinning but still the hard drive is not recognized in BIOS. Also I tried it with a SATA/USB adapter (ASMT 2105) and shortly after plugging it to my USB port, I see it for about 10 seconds in the device manager, before it disappears again.

To me it looks like some kind of check in the beginning seems to be failing and therefore the hard drive is not starting properly (maybe firmware is different between those boards). Therefore I wanted to ask, if this a clear indication that I should swap the ROM or if there's any other possibility which I could try to analyze this behaviour (some analysis tool to read some diagnostic data etc.).

Thank you in advance :wink:


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 Post subject: Re: Samsung HM321HI/SRM board replacement
PostPosted: January 6th, 2019, 11:10 
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Joined: December 19th, 2006, 8:49
Posts: 10528
Location: Portugal
Avsfan89 wrote:
Hi,

During my research in hope to retrieve my data from a faulty hard drive I found this interesting forum and I'm happy to join the community :)

I also have issues with a Samsung HM321HI drive, which is not working anymore. When I connected it to my PC over SATA, it wasn't recognized in BIOS at all and also the motor wasn't running (no noises at all). As some contacts on the board looked oxidated, I decided to buy a new PCB with the same revision and board number and replaced it with the original PCB. When I connect the hard drive now, I hear the motor spinning but still the hard drive is not recognized in BIOS. Also I tried it with a SATA/USB adapter (ASMT 2105) and shortly after plugging it to my USB port, I see it for about 10 seconds in the device manager, before it disappears again.

To me it looks like some kind of check in the beginning seems to be failing and therefore the hard drive is not starting properly (maybe firmware is different between those boards). Therefore I wanted to ask, if this a clear indication that I should swap the ROM or if there's any other possibility which I could try to analyze this behaviour (some analysis tool to read some diagnostic data etc.).

Thank you in advance :wink:


Hi there.

There are some chances that the firmware of both drives is not the same. Because of that you should write to the new PCB the ROM CODE from your old drive.

The problem is you might have further issues as ROM damae (like FIPS module) and that might be the cause for the drive not to spin to start with. If you replace the ROM chip to the new PCB and the drive stops spinning you will know that your original ROM is damaged and you should dump it and check FIPS section.

There are alternatives like adapting the drive to get the donor PCB by writting overlays to it, try several PCB(s) or ROMs, etc ...

But you will better off by sending the drives to a specialized data recovery firm as at this point it shouldn't be a very expensive recovery ...

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 Post subject: Re: Samsung HM321HI/SRM board replacement
PostPosted: January 6th, 2019, 15:12 
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Joined: September 8th, 2009, 18:21
Posts: 11213
Location: Australia
@Avsfan89, can you show us the output from the drive's terminal port?

How to connect a terminal adaptor on a Samsung drive ?
http://www.hddoracle.com/viewtopic.php?f=116&t=189

You should be able to find a USB-TTL adapter for US$5 or less.

TTL adapter:
http://www.hddoracle.com/viewtopic.php?f=46&t=192

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 Post subject: Re: Samsung HM321HI/SRM board replacement
PostPosted: January 7th, 2019, 18:18 
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Joined: January 6th, 2019, 5:25
Posts: 2
Location: Germany
Thanks for your quick replies! I'll order the USB-TTL adapter and see what information I can retrieve from the terminal.


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