Extreme Complex Case , Is someone ready to accept challenge

[posidon]

Hi Guys
I am dealing with a tough WD case & about to give up & finally will as community for some help.

Here is description ---
Hard disk is WD 2.5 " 500 GB , model no. -- WD5000BMVW - 11S5XS0
Inside is 1 TB disk , WD has converted it to 500 GB ( It has 3 Heads)
We got it 1 year back at that time Donor was not available ( this is bit uncommon model) so we returned to customer.
Customer sent to Stellar Informatics India which they retuned as Non recoverable.
Customer sent it back to us again , fortunately we were having donor . In clean room there was no scratches visible on platter,
Symptoms when powered were type of screatching noise (attached is the same) & spin down.
Donor is 100% compatible ( Dates of patient / donor vary with a single day) , Disk was not having detection even after successful transplant.
When put back heads in Donor , donor got perfect detection so there is no damage to downside platters too.
finally we suspect ROM may not be native , but there is no way (like Seagate F3) to check S/N ( at least I don't know) , (attached is ROM)
We tried donor rom and tone of sound changed & disk continued to spin (does not spin down)
What could the issue ,since we don't have access to modules Rom cant be regenerated, We have tried 15-20 Roms but its of no use.
Can someone pls. suggest a remedy or at least pin point exact technical issue ?
I am attaching all details of hard disk.

Download link -- https://drive.google.com/file/d/1aSFg8E ... sp=sharing

Attachments

WD500GB Patient.log

(4.18 KiB) Downloaded 723 times

WD 500GB Donor.JPG (31.11 KiB) Viewed 8149 times

[rogfanther]

You should talk to @Amarbir, he is in India and can probably help you, even if is just to talk to someone on the phone using the same language...

[pepe]

Without the appropriate instrumentation it is just guessing. Can you send photo of patient label?

[posidon]

Without the appropriate instrumentation it is just guessing. Can you send photo of patient label?

Hi pepe Thanks.
I have sent PM to you.

[fzabkar]

Compare the date code on the label against the date codes on the PCB and ICs. I can help if you upload photos of same.

[posidon]

Hi fzabkar
Thanks for your help. Actually I have ensured both patient /donor are as close as possible. In fact there is only single days difference between dates.

[fzabkar]

Hi fzabkar
Thanks for your help. Actually I have ensured both patient /donor are as close as possible. In fact there is only single days difference between dates.

... we suspect ROM may not be native , but there is no way (like Seagate F3) to check S/N ...

I took your statement to mean that there was a possibility that the PCB or ROM had been swapped. Therefore, I am suggesting that you compare the date on the label of the patient against the date codes on the patient PCB/ICs. At the very least, compare the date on the ROM against the label.

[Doomer]

what's the dcm code from the label and original heads serial number(can be found on the small sticker on the heads connector)?

[posidon]

what's the dcm code from the label and original heads serial number(can be found on the small sticker on the heads connector)?

Hi Doomer & fzabkar
Thank you so much for all your help.
Attached is DCM of patient & donor. I have sent snap of patient /donor via PM.

Attachments

merge_from_ofoct.jpg (24.17 KiB) Viewed 7293 times

[fzabkar]

Here is an example: