Hello!
I need some help please!
This week this is the third drive with locked SA.
The drive is a WD10JMVW-11AJGS2
After a head excahnge, and PCB exchange to SATA (I changed U12 too) the drive identified fine, i can read firmware modules with Sediv, but when i would like to write -example modded 02 module- it looks like everyting fine, but when i read the modded module, i see no changes.
Sediv has a feature "SA Unlock", but this not helps.
Maybe somebody here can.
Thank you!

Unless there are underlying issues, there is a high chance HSA is not fully compatible.

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Hard Disk Drive (HDD), Solid State Drive (SSD, SATA, NVMe, etc), USB Flash Drive and RAID Data Recovery Specialist in Massachusetts

Thank you labtech!
I can access to LBA, but with so many UNC errors in the beginning of LBA-s. The end of the disk, all heads reads blocks fine.
I think there is some media damage on the outer space of platters, and the media damage degraded the HSA.
What is your opinion?

Well, you did not mention that, so then, yes, media damage seems to be the problem.

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Hard Disk Drive (HDD), Solid State Drive (SSD, SATA, NVMe, etc), USB Flash Drive and RAID Data Recovery Specialist in Massachusetts