WD - HGST 18TB HELIUM - ROM?

[DRUG]

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

[fzabkar]

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.

[DRUG]

According to a pcb vendor only both rom chips should be changed.

Will try soon and report back.

[vx1]

https://pt.aliexpress.com/item/4000594884381.html

3x2 and pitch 0.5mm

[vx1]

ops, adapter wrong...

[fzabkar]

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

[fzabkar]

Here are the package dimensions.

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

[suricate.ch]

Thank you, Reveltronics is great.

[DRUG]

Here are the package dimensions.

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.

[fzabkar]

Are you saying that two PCBs from the same model behaved differently, one with a unique key in the MCU, the other without???

[DRUG]

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.

[Data-Salvage]

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?