Alcor Micro Unknown Fa00 F W Fa04 Work New! 🆒 🚀
The identifier Unknown [FA00] with firmware typically refers to an Alcor Micro controller (often identified as AU6989SN-TA AU6989SNCS-TA
Have you ever plugged in your flash drive only to be met with a cryptic "Unknown Device" message? If you’ve dug into the hardware details and found labels like or firmware alcor micro unknown fa00 f w fa04 work
- LUN 0 (FA00) – Control interface / firmware management (may not appear as a storage device directly)
- LUN 1 (FA04) – Actual card reader slots (SD, MMC, MS, xD, etc.)
If you’re instead trying to make a non-working FA04 appear (e.g., after a driver conflict), the feature to attempt is logical LUN reset rather than physical replugging. The identifier Unknown [FA00] with firmware typically refers
The designation "Alcor Micro Unknown [FA00] F/W [FA04]" typically appears in specialized diagnostic or mass production tools (such as AlcorMP) when a USB flash drive's controller or firmware is corrupted, misidentified, or physically damaged. Identifying the Error LUN 0 (FA00) – Control interface / firmware
Controller Identity: The "FA00" code is not a standard model name but an internal designation often associated with the AU6989SN-TA .
2. Technical Context
- Controller Manufacturer: Alcor Micro (Taiwan).
- Common Controllers: AU6989, AU6998, SC708, AU698x series.
- The Error: The device appears in Windows Device Manager as "Unknown Device" or "Alcor Micro USB Device" with the Hardware ID
USB\VID_058F&PID_FA00.
