Fujitsu MPG engineering track recovery

Can anyone tell me if I can rewrite the engineering track of fujitsu MPG series harddisk? I have a couple of drives here that seem blank according to the official Fujitsu recovery software.... Even FFDR says it can not recover the engineering track of these drives!

Thanks!
(great site by the way)

[yomayo]

what is engineering track ?

[bradeanudaniel]

testdisk.exe have you tried? (anoying?) it may help you.

http://www.cgsecurity.org