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 Post subject: How to recover WD Mybook Harddisk
PostPosted: August 30th, 2019, 6:11 
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Joined: April 3rd, 2015, 4:26
Posts: 51
Location: Germany
Hi there,

i have a Harddisk from a WD MyBook. Bridgeboard burned.

If I connect the bridgeboard to the powersupply i just hear some bzzzzt near L6 L1 but nothing happen.
I ordere a Donor Bridgeboard and transfered the U2 BIOS Chip.
When I connect the drive it will be recogniced as a 2TB -> thats right
But theres no partition.
What can I do?

R-Studio wont find anything coz of the decrytion...

best regards
Fabian


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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: August 30th, 2019, 13:57 
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Joined: March 7th, 2009, 12:43
Posts: 902
Location: Angel Data Recovery
fabianf wrote:
Hi there,

i have a Harddisk from a WD MyBook. Bridgeboard burned.

If I connect the bridgeboard to the powersupply i just hear some bzzzzt near L6 L1 but nothing happen.
I ordere a Donor Bridgeboard and transfered the U2 BIOS Chip.
When I connect the drive it will be recogniced as a 2TB -> thats right
But theres no partition.
What can I do?

R-Studio wont find anything coz of the decrytion...

best regards
Fabian


Is it Oxford based "Bridgeboard" ?

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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: August 30th, 2019, 19:58 
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Joined: September 8th, 2009, 18:21
Posts: 11714
Location: Australia
Can you upload a photo of the bridge PCB?

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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: August 31st, 2019, 6:46 
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Joined: April 3rd, 2015, 4:26
Posts: 51
Location: Germany
Hi,

i cant see if the Board is an oxford Bridgeboard.
Here are the Pics of both.


Attachments:
Foto 31.08.19, 12 43 29.jpg
Foto 31.08.19, 12 43 29.jpg [ 4.41 MiB | Viewed 876 times ]
Foto 31.08.19, 12 43 23.jpg
Foto 31.08.19, 12 43 23.jpg [ 3.8 MiB | Viewed 876 times ]
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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: August 31st, 2019, 17:09 
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Location: Australia
It looks like an Asmedia ASM1051W. ISTR that this chip decodes in the same way as a JMicron JMS538S. :?

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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 2nd, 2019, 3:08 
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Location: Angel Data Recovery
Asmedia doesnt do encryption, (BTW which model of HDD?) . Encryption came elsewhere. Was this storage used under MAC ?

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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 2nd, 2019, 3:45 
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DR-Kiev wrote:
Asmedia doesnt do encryption,

AFAICT, the Asmedia ASM1051W bridge is pin compatible with the JMS538S. So the JMicron bridge does encryption, but the Asmedia does not?

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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 2nd, 2019, 8:06 
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Joined: October 21st, 2007, 8:48
Posts: 1333
@op
Did you try to connect the drive directly to a PC via SATA port?


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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 2nd, 2019, 9:08 
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Location: Angel Data Recovery
fzabkar wrote:
DR-Kiev wrote:
Asmedia doesnt do encryption,

So the JMicron bridge does encryption, but the Asmedia does not?


Yes, exactly. And if you take more careful look to those poor quality pictures, you will find that donor PCB is JMicron based (top left logo) and patient PCB is Asmedia based (which doesn't do encryption/decryption) , that is why topic-starter was unable to decrypt the data with different bridge controller :))

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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 2nd, 2019, 9:31 
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Joined: April 3rd, 2015, 4:26
Posts: 51
Location: Germany
@unknown
Quote:
Did you try to connect the drive directly to a PC via SATA port?

Yes I did. But no way to recover.

@Dr-Kiev
Quote:
Was this storage used under MAC ?

No

Why are there 2 different types of chips. -> Ive seen it now. One it Jmicron (bad PCB) and the other one is asmedia (good pcb)
I thought, that the number 4060-705094-001 is the right. its the same on the downside of the boards.

best regards
Fabian


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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 2nd, 2019, 9:39 
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Joined: October 21st, 2007, 8:48
Posts: 1333
So, your drive is encrypted with Jmicron.
IMO, you have two options, one if you have a proper tool like (PC3K, MRT...etc) you will be able to decrypt the drive. Option two is to seek for a fully matched (bridgeboard) with matched Jmicron based.

Good luck


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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 2nd, 2019, 10:31 
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Joined: April 3rd, 2015, 4:26
Posts: 51
Location: Germany
@unknown
Thank u for ur help. Ill have a look for another Donor board with the JMicron Controller.

Fabian


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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 2nd, 2019, 10:55 
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Joined: August 15th, 2006, 3:01
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Hello,
Many Time The 8 Legged Mosfet is the issue ,Try replacing those from new board and use original rom chip in your defective board ,Might be thats all that it takes

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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 2nd, 2019, 16:24 
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Joined: September 8th, 2009, 18:21
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Location: Australia
There is no need to replace the dual MOSFET power switch. It can simply be bridged with two wires.

If the OP wishes to do some simple troubleshooting, I can identify the voltage test points.

Western Digital My Book Essential bridge PCB, 4061-705094:
http://www.hddoracle.com/viewtopic.php?f=112&t=1032

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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 9th, 2019, 4:37 
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Joined: April 3rd, 2015, 4:26
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Location: Germany
HI fzabkar,

for sure. Can u help me with it? How can i bridge the power switch.

best regards
Fabian


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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 9th, 2019, 5:38 
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Location: Australia
I would start by measuring V1, V2 and +5V.


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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 9th, 2019, 8:54 
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Joined: January 8th, 2008, 5:21
Posts: 881
Location: uk
Quote:
Why are there 2 different types of chips.

Why?
It is usually due to regional variations.
In some regions self encrypting devices are illegal so non self encrypting devices are marketed to stay within local laws.
For example the USA, EC, Russian, or the Middle Eastern markets.


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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 10th, 2019, 10:12 
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Joined: April 3rd, 2015, 4:26
Posts: 51
Location: Germany
+5v = 4,98 V
V1 = 11,95 V
V2 = 11,30 V


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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 10th, 2019, 16:24 
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If you really are measuring 11V and 12V, then there is something seriously wrong with the PCB or your measurement technique. I would have expected to see 3.3V and 1.2V.

What do you measure on your donor PCB?

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 Post subject: Re: How to recover WD Mybook Harddisk
PostPosted: September 13th, 2019, 4:16 
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Joined: April 3rd, 2015, 4:26
Posts: 51
Location: Germany
I used a new one now

+5v = 4,98 V
V1 = 0,781 V
V2 = 0,06 V

The PCB is getting very hot. ?!


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