This is a high-performance USB 2.0 controller supporting up to 4-channel interleaving. It is notorious for a specific failure: When this happens, the drive stops responding to normal commands and only shows up in Windows Device Manager as an error. The correct Alcor tool is the only way to break it out of DFU mode.
The Alcor MPTool runs only on Windows (XP, 7, 8, 10, 11). It requires administrator privileges. alcor micro usb repair tool au6989sngtc au6998sn free
❌ (shorted capacitor, cracked die), no free tool can fix it. In that case, the controller can be salvaged for other NAND chips. This is a high-performance USB 2
