Smi Mptool Sm32x Sm34x Smi Mass Production Tool _verified_ Jun 2026
These controllers are notorious for "firmware corruption." If you unplug a drive during a write operation, the controller locks up. Windows will show "0 bytes" or "Insert Disk." The SM32x MPTool is the only way to resurrect these drives without hardware shorting (though shorting is sometimes required to force it into "ROM Mode").