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 Post subject: WD20NMVW-11AV3201
PostPosted: March 7th, 2016, 9:31 
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Joined: October 21st, 2007, 8:48
Posts: 1712
Hello,
The customer bring me the drive above with "Slow responding + dead head 2,5"
The partition open in recovery software but with bunch of bad sectors because of H 2 and 5.

After replacing heads with matched donor, heads 2 and 5 back intact now. But when I tried to open the partition it shows nothing and I am trying to scan the entire drive now.

Very weird, why after replacing heads the partition become inaccessible?

Any thoughts?

Thanks in advance.


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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 7th, 2016, 12:14 
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Joined: August 18th, 2010, 17:35
Posts: 3669
Location: Massachusetts, USA
Possible other heads are now NOT compatible or something trivial is being overlooked.

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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 7th, 2016, 12:38 
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Joined: October 21st, 2007, 8:48
Posts: 1712
labtech wrote:
Possible other heads are now NOT compatible or something trivial is being overlooked.

You mean donor heads are not compatible?
But the drive is working now, even head 2 and 5 are intact. Surface test is almost fine too.

Any suggestions?


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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 7th, 2016, 13:40 
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Joined: December 8th, 2013, 4:48
Posts: 838
Location: Pakistan
what tool you use to rectify slow problem ?
can you show us sector 0, 63 & 2048 ?

what i have understand that after swapping heads you are trying to access data through windows ?

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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 7th, 2016, 16:00 
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Joined: October 21st, 2007, 8:48
Posts: 1712
I am not in the office now. So, I can't upload sector 0,63 and 2048.
I already imaged the patient to a functional drive.


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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 7th, 2016, 19:50 
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Joined: August 18th, 2010, 17:35
Posts: 3669
Location: Massachusetts, USA
unknown wrote:
labtech wrote:
Possible other heads are now NOT compatible or something trivial is being overlooked.

You mean donor heads are not compatible?
But the drive is working now, even head 2 and 5 are intact. Surface test is almost fine too.

Any suggestions?

Yes, meant in the previous post heads other than #2 and #5 from the donor head assembly.
Not sure what "drive is working now" mean. Could mean many things.

If surface test on all heads is fine, then all seems fine.

So, something else is going on.

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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 8th, 2016, 5:38 
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Joined: May 21st, 2007, 16:10
Posts: 1592
Location: Gothenburg/ Sweden
If I understand you correct, you have a full sector-sector clone of the drive.
If so, it could be just a lost partiotion, scan with R-Studio and see.
If not, the drive maby has encryption on it...either as a Wd external or by client SW.

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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 8th, 2016, 6:00 
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Joined: December 8th, 2013, 4:48
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Location: Pakistan
could it be translators also ?

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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 8th, 2016, 11:24 
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Joined: October 21st, 2007, 8:48
Posts: 1712
First, thanks for replies.
It's not a translator issue I believe.
After scanning the entire drive with r-studio shows the folders with correct names empty and a lot of extra found files with correct name and capacity but not working.
I think data has been shifted.

Any suggestions please?


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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 8th, 2016, 11:35 
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Joined: October 21st, 2007, 8:48
Posts: 1712
Here is sectors 0,63 and 2048 :


Attachments:
Sectors.rar [1.14 KiB]
Downloaded 552 times
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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 8th, 2016, 11:44 
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Joined: March 19th, 2015, 15:01
Posts: 1388
Location: isreal
data is definitely shifted
each sector you have uploaded (0, 63 & 2048) has 516B instead of 512B
you have extra 4 bytes @ the beginning (0x04 0x02 0x00 0x00)
(how can it be ?)


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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 8th, 2016, 11:52 
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Joined: October 21st, 2007, 8:48
Posts: 1712
Thanks for the quick answer sir,
Actually I don't know how this happened.
Is there any advices , please?


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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 8th, 2016, 13:35 
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Joined: December 8th, 2013, 4:48
Posts: 838
Location: Pakistan
unknown wrote:
Hello,
The customer bring me the drive above with "Slow responding + dead head 2,5"
The partition open in recovery software but with bunch of bad sectors because of H 2 and 5.

After replacing heads with matched donor, heads 2 and 5 back intact now. But when I tried to open the partition it shows nothing and I am trying to scan the entire drive now.

Very weird, why after replacing heads the partition become inaccessible?

Any thoughts?

Thanks in advance.


how you apply the slow fix ? did you manually patch MOD 02 ??
i would check by writing back the original MOD 02 without slow-fix.

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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 8th, 2016, 13:46 
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Joined: October 21st, 2007, 8:48
Posts: 1712
I applied slow fix from MRT.


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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 8th, 2016, 14:22 
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Joined: December 8th, 2013, 4:48
Posts: 838
Location: Pakistan
did you backup MOD 02 ?
if yes, write it back and see if you get correct geometry of the drive e.g 512b per sectors.

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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 8th, 2016, 16:33 
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Joined: November 29th, 2006, 10:08
Posts: 7864
Location: UK
I'm presuming you're using MRT to clone?

If so, post those same sectors read directly in the WD utility and not from the cloned copy.

Have heard things about the MRT "data extractor type tool" causing issues.

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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 8th, 2016, 18:08 
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Joined: October 21st, 2007, 8:48
Posts: 1712
Thanks for replies friends.
Special thanks to Mr. Jermy he was trying to help me at this issue from 3:00 PM to 10:30 PM :)
@ Mr. Sean: I will post those sectors again from WD utility tomorrow when I get to the office.
Thank you very much.


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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 9th, 2016, 6:20 
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Joined: October 21st, 2007, 8:48
Posts: 1712
Sectors directly from WD MARVEL utility MRT :


Attachments:
Sectors from MRT.rar [1.19 KiB]
Downloaded 589 times
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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 9th, 2016, 7:09 
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Joined: December 8th, 2013, 4:48
Posts: 838
Location: Pakistan
sector 0, MBR is missing the signature.

sector 2048: NTFS boot sector appears to be normal corresponds to a partition size:
0xE8DF7FFF = 3906961407 Sectors = 1863GB, correct 512b per sector, type NTFS.

as Sean said it could be another MRT bug.

BTW, if you connect original drive does it show the partition ?

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 Post subject: Re: WD20NMVW-11AV3201
PostPosted: March 9th, 2016, 8:42 
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Joined: October 21st, 2007, 8:48
Posts: 1712
Thank you all my friends. Case closed as the customer not willing to pay additional fees for DR.


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