Hi,

I have WD400BB-22HEA0. I bought this drive with burned PCB. I changed PCB to the good one and the drive started working, BUT in the BIOS now it is recognized as WDC ROM MODEL MAMMOTH, in the MHDD on the startup there is message: WARNING: MULTIPLE SET OF COMMAND DATA ABORTED (or something like that).

When I try to scan this HDD, all blocks cannot be identified (all !!!!!! - ABRT). I don't care about data, I want only to repair the hdd.

Is anyone who know what the problem is and what can I do to resolve it?

Maybe You Dmitry?

Thanks in advance

DAMON

You cannot swap pcbs on such WDs, they have adaptive information in their EEPROM. You have to swap EEPROM (8-pin chip) first.

Thanks Dmitry,

Is this applicable to all new WD's? I have many model of WD's (not as new as this one(2004) and there is no problem with just swap PCB.

OK, tell me if you can, what this EEPROM looks like and where it is located on the PCB? Is there any symbol on this chip? Is it possible to swap this chip just drag and drop, or maybe I can do this only by using soldering iron?


Thanks a lot

DAMON

This is applicable to all WDs with Marvell CPU (biggest chip).

There is only one 8-pin chip on the pcb, that is the EEPROM.

This chip... it is serial flash... (M25P10AV, AT25F1024,....)



I'm not sure... i replace PCB in Marvell based HDDs many times... and a few times i can swap PCB without swapping serial flash...
I think... this HDDs (like Maxtor drives) have many firmware revisions... and firmware revisions can be discriminate only by their check sum...
I have many readed flash contents from WDC Marvell based HDDs, and i can insert files...

Mikippp

pcb swap works fine on WD800JB-00JJC0
with Atmel 25F 1024 AN
Marvell core

waiting for summer 2005 to find out why.

btw when is summer 2005 ? - i thought that wa snow ?

For each drive family of WDC400BB or WDC600BB, etc., WDC has two different firmwares - one initializing from head 0 and one from head 1. For example, drive family 45 has FW 17.07W17 and 16.06V16. The use of a PCBA from a different drive from the same family can result in a different drive capacity. With a PCBA from a different family, however, the drive cannot initialize correctly and will report the FW number of the PCBA only (for example 17.07W). Two drives belong to one and the same drive family if the forth character in their ser numbers are the same. For example: WMA8H********** and WDC8E********* belong both to family 45 and one can swap their PCBA's