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 Post subject: Re: PCB swap on a WD10EAVS
PostPosted: January 12th, 2018, 16:20 
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Joined: December 19th, 2006, 8:49
Posts: 8383
Location: Portugal
If the damaged drive have a PCB without ROM chip (ROM EMBEDED ON MCU) then you could use tools like the following ones to rebuild the ROM by reading the COPY on the SA and write it back to the donnor (new) PCB :

WDMarvel :

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SeDiv :

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WDR :

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For HRT 3 you would need to READ SA then re-create ROM with HEX editor by manual way explained here - http://www.hddoracle.com/viewtopic.php?f=86&t=1429 and then write it to PCB this way :

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HRT 5 UDMA can DECODE ROYL ROM (or even "older" MARVELL based) but you would still have to use the manual method to rebuild ROM by reading SA first :

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When i do have to rebuild ROM i allways use HRT card + WDMarvel tool as i think it's the easy way for me. You can do it as well without any hardware card as WDMarvel is SOFTWARE ONLY.

What i do is to READ SA first and then use automatic WDMarvel method and then check ROM MODULES with HEX EDITOR and if they look ok (not empty) i write ROM to PCB but make sure first that ROM size is correct by backing up donor PCB ROM first and comparing ROM size with image of ROM (re-build) that you are going to write.

It's very easy if you know what you are doing but can be very complex if you don't understand (fully) what you are doing and you might brick the PCB if you write wrong code to it or if your system does interfeer with the PCB while you are writting ROM (if you don't have hardware based tools like MRT, PC-3000, HRT, whatever ....) This is another risk of software only tools.

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