For this cases u need tools for access Engineering Cylinders,this area are on negative way, any program like winhex or , another sector edit only access on positive way this area called too System Area Diskware its a hidden zone from factory where its information for calibration, access to data and settings,etc for access the HDD
If u get , this tool´s its not simple to use like try to write a Bin file on a motherboard to update firmware because HDD´s are piece of engineering this is some wich some newbies need to understand are , Mechanical, Electronic, and Microcode parts, on PCB´s and written on Platters too on many branch´s . and u need to have knowledgment about the way of comunication betweeen HDD and the HOST this is very important, for u and many newbies who want to do a data recovery
read my post why its need it
We need to understand even HRT, PCI, and another´s tools are not magic tools
hard-disk-drives-repair-and-data-recovery-f1/help-interpret-errors-t7668.htmlBest Regards
Sinceraly
Alberto