SalvationData Data Recovery System User Manual page 76

 Auto Skip Sectors(Bad): Set the number of bad sectors to skip automatically
when a bad sector is encountered during the imaging process.
 Skip Now: Manually skip a certain number of sectors immediately.
 Speed: Imaging speed control. Switch between UDMA and PIO mode. System
will choose speed mode automatically if Auto Swit is checked.
 Direction: Set imaging direction, forward or backward. When a normal imaging
process is hard to proceed due to concentrated bad sectors, users can try a
Pic. 4-59 Parameter Settings of Advanced Imaging