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DRUG
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: April 19th, 2022, 13:33 
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fzabkar wrote:
DRUG wrote:
Already done some measurements, both fuses read 0.00V

Volts or ohms?

What about the rest?

What model is it?


Model is:
WD Ultrastar® DC HC550

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fzabkar
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: April 19th, 2022, 15:55 
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AFAICT, your ROM has a width of 3mm and a pin pitch of 0.8mm. I haven't been able to find a breakout PCB or DIP-to-smt adaptor that has these dimensions. :-(

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DRUG
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: April 20th, 2022, 6:40 
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According to a pcb vendor only both rom chips should be changed.

Will try soon and report back.

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vx1
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: April 20th, 2022, 10:21 
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https://pt.aliexpress.com/item/4000594884381.html

3x2 and pitch 0.5mm

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vx1
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: April 20th, 2022, 10:56 
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ops, adapter wrong...

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fzabkar
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: April 20th, 2022, 15:18 
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I've been examining the firmware updates for this family.

He16 & He18 Ultrastar DC HC550 Firmware Update:
https://support-en.westerndigital.com/app/answers/detail/a_id/29514

PCM R270 SATA 4kn&512e
https://download.wdc.com/hdd/PCGAW270.zip

PCM R232 SAS 4kn&512e
https://download.wdc.com/hdd/PCM_R232_SAS_4kn%26512e.zip

PCM R232 SATA 4kn&512e
https://download.wdc.com/hdd/PCM_R232_SATA_4kn%26512e.zip

PCM R120 SAS 4kn&512e
https://download.wdc.com/hdd/PCM_R120_SAS_4kn%26512e.zip

PCM R120 SATA 4kn&512e
https://download.wdc.com/hdd/PCM_R120_SATA_4kn&512e.zip

I have extracted the individual firmware modules from each of the payloads (see attachment). I notice that there is an RSIG module (ID = 0x16). This consists of a 0x100-byte signature plus a 32-bit checksum. The little-endian sum of the dwords in the signature plus the checksum dword is 0x00000000.

I don't recall seeing this module in earlier He firmwares, so perhaps WD has tightened the security.


Attachments:
He16_He18_Ultrastar_DC_HC550.7z [7.15 MiB]
Downloaded 378 times

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fzabkar
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: April 26th, 2022, 17:56 
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Here are the package dimensions.

Attachment:
USON8-3mmx4mm.gif
USON8-3mmx4mm.gif [ 33.23 KiB | Viewed 9941 times ]


DIP adapter (not cheap):

https://www.reveltronics.com/en/shop/76/7/chip-programmers/adapter-dfn8-3x4-udfn8-vson8-uson8-dil8-dip8-76-detail
https://forum.reveltronics.com/viewtopic.php?t=79

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suricate.ch
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: April 27th, 2022, 6:24 
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Thank you, Reveltronics is great.
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DRUG
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: May 2nd, 2022, 18:28 
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fzabkar wrote:
Here are the package dimensions.

Attachment:
USON8-3mmx4mm.gif


DIP adapter (not cheap):

https://www.reveltronics.com/en/shop/76/7/chip-programmers/adapter-dfn8-3x4-udfn8-vson8-uson8-dil8-dip8-76-detail
https://forum.reveltronics.com/viewtopic.php?t=79


I managed to find a slighty cheaper one.
https://a.aliexpress.com/_mOLkv0Q

About the case, it was solved, only 2 rom swapped.

HOWEVER, today I got exactly the same model coming in, same issue, and since i had a spare pcb i quickly jumped to be a rom jockey to find out it didnt work. Upon further inspection I decided to swap the controller, and data is being cloned right now.

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fzabkar
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: May 2nd, 2022, 19:20 
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Are you saying that two PCBs from the same model behaved differently, one with a unique key in the MCU, the other without???

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DRUG
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: May 2nd, 2022, 19:58 
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fzabkar wrote:
Are you saying that two PCBs from the same model behaved differently, one with a unique key in the MCU, the other without???


Yes... When the data is cloned i'll test if the donor mcu was damaged by any chance.

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Data-Salvage
 Post subject: Re: WD - HGST 18TB HELIUM - ROM?
PostPosted: May 13th, 2025, 1:14 
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DRUG wrote:
fzabkar wrote:
Are you saying that two PCBs from the same model behaved differently, one with a unique key in the MCU, the other without???


Yes... When the data is cloned i'll test if the donor mcu was damaged by any chance.



sorry for asking you about this old post .
did you swapped the controller and roms to donor board? could you get the data?
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