I believe that each HDD PCB contains calibration for the platters and heads and needs to be calibrated if changed as the alignment and mechanical properties are unique for each drive or maybe that’s just the case for platter transplants, can’t quite remember and that was many years ago.
I work in IT and I can’t for the life of me remember the specs for anything above USB3.0 because of the stupid versioning and version changes. They really need to revise it back to something simple or by renaming is to something that indicates speed and power and dropping versioning all together.