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 Post subject: ST2000DM001 - Dead ROM chip and dead head
PostPosted: February 21st, 2020, 11:48 
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Joined: July 27th, 2019, 17:40
Posts: 87
Location: Vienna
Hello,

I have a ST2000DM001 with a ROM-chip which I can't read. I tryed it multiple times with MRT and with Revelprog...

Spildit mentioned in another post
Quote:
If you have something like salvation data tools or PC-3000 you might be able to retrive a copy of the ROM contents from the firmware inside the platters using a temporary loader to access the firmware. Once you get your copy of the ROM content with adaptive information you can re-flash another chip on another board.

... that sounds promissing but first I need to get some donor to replace the heads. I know the Preamp should fit and the easiest way to check that is the terminal which don't work in my case.

So my plan would be to find a perfect match (Model-No., both parts of the Part-No., Firmware and Country) to have the best chances to get the right preamp... What do you think? Or do you have other suggestions?

Is the method with the temporary loader and rebuilding of the ROM even possible with that model? Any other ideas?


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 Post subject: Re: ST2000DM001 - Dead ROM chip and dead head
PostPosted: February 21st, 2020, 12:59 
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Joined: October 3rd, 2005, 0:40
Posts: 2915
Location: Hungary
I wonder why Spildit thinks you can get a copy of rom back from the sa so easily, it is commonly known to be difficult, if even possible. Anybody could recover it if it was that easy.
BTW i had a client who managed to kill his ROM chip using some MRT reader which wasn't compatible with low voltage spi memories (fed the rom with 3.3V supply).
I managed to recover that rom and the data as well, but it is fairly complicated and i have no information about anybody else being capable of doing that, including SRS.
And to be honest, my method does not give good results on new drives and there is a chance yours is not recoverable either. Please send me pic of label.
pepe

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 Post subject: Re: ST2000DM001 - Dead ROM chip and dead head
PostPosted: February 21st, 2020, 13:04 
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Joined: April 24th, 2018, 11:02
Posts: 146
Location: Iran
pepe wrote:
I wonder why Spildit thinks you can get a copy of rom back from the sa so easily, it is commonly known to be difficult, if even possible. Anybody could recover it if it was that easy.
BTW i had a client who managed to kill his ROM chip using some MRT reader which wasn't compatible with low voltage spi memories (fed the rom with 3.3V supply).
I managed to recover that rom and the data as well, but it is fairly complicated and i have no information about anybody else being capable of doing that, including SRS.
And to be honest, my method does not give good results on new drives and there is a chance yours is not recoverable either. Please send me pic of label.
pepe

Hi, can you share your method? or its just for your own use?

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 Post subject: Re: ST2000DM001 - Dead ROM chip and dead head
PostPosted: February 21st, 2020, 13:24 
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Joined: July 27th, 2019, 17:40
Posts: 87
Location: Vienna
siamak5561 wrote:
Hi, can you share your method? or its just for your own use?

... wanted to ask the same.

BTW. Spildit didn't tell it's easy he just told it might be possible with some tools.

pepe wrote:
BTW i had a client who managed to kill his ROM chip using some MRT reader which wasn't compatible with low voltage spi memories (fed the rom with 3.3V supply).

... that's why i got an Revelprog IS extra as addition to my MRT.

pepe wrote:
Please send me pic of label.

... don't have the drive here but I send you a PM with all infos which I have her.


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 Post subject: Re: ST2000DM001 - Dead ROM chip and dead head
PostPosted: February 21st, 2020, 14:38 
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Joined: October 3rd, 2005, 0:40
Posts: 2915
Location: Hungary
Hello,

the method is not for share. Sorry.
On the other hand, i am not sure you could build a solution even if i shared the info.
pepe

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No bitcoin donations :)


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 Post subject: Re: ST2000DM001 - Dead ROM chip and dead head
PostPosted: February 21st, 2020, 15:02 
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Joined: July 27th, 2019, 17:40
Posts: 87
Location: Vienna
No problem, I understand that if you invest a ton of time you don't want to give it away fro free. But maybe there is a trick to revive a chip (lower or higher voltage, heat or extra cooling, ...) or something else i could try.

It's a disk of a friend and more for experimenting / training purpose so if it works great, if not also not a big deal...


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 Post subject: Re: ST2000DM001 - Dead ROM chip and dead head
PostPosted: March 1st, 2020, 4:37 
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Joined: July 27th, 2019, 17:40
Posts: 87
Location: Vienna
I got 3 identical reads of the chip - how to match now the preamp when the disk don't start and read the SA with the old heads?


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 Post subject: Re: ST2000DM001 - Dead ROM chip and dead head
PostPosted: March 1st, 2020, 14:10 
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Joined: March 6th, 2010, 3:46
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Location: Kolding | Denmark
maddin wrote:
I got 3 identical reads of the chip - how to match now the preamp when the disk don't start and read the SA with the old heads?

You could try post a ROM copy :wink:

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 Post subject: Re: ST2000DM001 - Dead ROM chip and dead head
PostPosted: March 4th, 2020, 5:32 
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Joined: July 27th, 2019, 17:40
Posts: 87
Location: Vienna
Here is the full ROM copy + the copy of an donor-PCB.

Could you also please tell me for what I need to look that I know it the next time? Thanks a lot for you help...


Attachments:
File comment: Original + donor PCB
rom.zip [726.36 KiB]
Downloaded 31 times
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 Post subject: Re: ST2000DM001 - Dead ROM chip and dead head
PostPosted: March 4th, 2020, 7:28 
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Joined: March 6th, 2010, 3:46
Posts: 463
Location: Kolding | Denmark
ORIG_20200221_184400_FLASH_25040 = Pre CC 06 - HM 00 01 02 03 04 - SN: S240xxxx
PCB_2_20200220_122553_FLASH_25040 = Pre B3 03 - HM 00 01 02 03 - SN: W1E0xxxx

To locate Pre in ROM, change HM and do a compare. On your donor you could do a Ctrl+l in terminal.

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 Post subject: Re: ST2000DM001 - Dead ROM chip and dead head
PostPosted: March 4th, 2020, 12:55 
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Joined: July 27th, 2019, 17:40
Posts: 87
Location: Vienna
digisupport wrote:
To locate Pre in ROM, change HM and do a compare. On your donor you could do a Ctrl+l in terminal.

Thanks for you help. But I don't get it really how to find the Preamp... I try to search for CC 06 and B3 03 in the files an I found the following:

000257b0: 0430 0440 0450 0460 0470 0480 0490 cc06
000257b0: 0430 0440 0450 0460 0470 0480 0490 b303

000657b0: 0430 0440 0450 0460 0470 0480 0490 cc06
000657b0: 0430 0440 0450 0460 0470 0480 0490 b303

This 2 spots contain the searched values in both files - are this 2 addresses always the same which show the preamp or is there some other way to navigate in the ROM-file?

For the headmap i didn't find a spot which could be right,


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