SalvationData Data Recovery System User Manual page 51

 Select Main Module: select the main module which guarantees normal
operation of disk.
 Primary/Subsidiary Module: The primary module mode only makes the backup
of the main module of disk. For WD, it is okay to only back up the main module.
If there are any errors during the read process, the remaining part can be backed
up by secondary module mode. What is more, the primary and subsidiary module
can be simultaneously selected.
3) Firmware Write
The firmware write module can flexibly write in all or part of data of firmware.
The rapid repair for disk with defective firmware is the most common function in
repairing disk. To repair the disk with defective firmware, just write the backup
firmware file in the target disk's firmware zone to replace the original firmware which
Pic. 4-18 Screen of firmware write