Hi guys! I found something interesting with this drive that might be of help for you. The drive had the original PCBA which seemed to be OK. The drive couldn't initialize and rejected all loaders I tried. I was able, however, to identify the loader version by going to "drive passport" submenu. I found the following versions: A1Y.2500, A1Y.3300, A1Y.1300 and A1Y.4500. None of them was able to start the drive. Then I tried other PCB's known as good . With two of them it did the same thing, but with the third the drive initialize successfully!
I came to the conclusion that there exist at least two version of PCB's that are not competable - maybe one for UDMA33 and one for UDMA100?!