It is highly likely that you are referring to the , specifically the variant engineered for the SM3256 controller family (where "536" is a common typo or OCR error for SM3256).
If configured correctly, the tool can resurrect a "bricked" drive—saving the hardware from being discarded. However, the process is destructive; running the tool erases all data on the drive. Therefore, it is strictly a tool for hardware rehabilitation rather than data retrieval in the traditional sense. smi mptool v2 536 v7