Remember: Alcor Micro makes reliable, but often undocumented, silicon. The FA00 identifier is their version of a "Help! I have no driver!" distress signal. Now that you’ve decoded it, you can either fix it or move on.
Since the "FA00" code is generic, you need the to find the right repair tool. Use ChipGenius to look for a string of letters and numbers like EC 3A 94 C3 A4 CA . 2. Download the Alcor MP Tool
You need a version of the Alcor MPTool that supports the FA04 firmware. Look for Alcor AU6989SN-TA AU6989SN-GT alcor micro unknown fa00 f w fa04 top
Here is the core solution. Do not rely on automatic "Update Driver" – it will fail. Follow these steps:
When a USB flash drive stops working, it often identifies itself in low-level flashing tools with a cryptic error code. One of the most specific and frustrating errors encountered by data recovery specialists and DIYers alike is the status. Now that you’ve decoded it, you can either
A previous flashing attempt used incorrect software versions.
If you want a tailored deep dive, paste lsusb/dmesg output and any chip markings; I’ll produce a step‑by‑step analysis and safe reflashing plan. Now that you’ve decoded it
Unknown [FA00] — This means the diagnostic tool cannot find a matching chip in its database, or the chip is reporting a generic "fail" code.
The technical details for "Alcor Micro Unknown FA00 F/W FA04 Top" refer to a common error state found in USB flash drives using Alcor Micro controllers, specifically the AU6989SN-TA Technical Breakdown "FA00" Identification : In diagnostic tools like ChipGenius
Once the drive is in test mode, download a verified copy of the flashing tool, such as , from a trusted repository like USBDev.ru Alcor Archive.
When diagnosing a corrupted USB flash drive using low-level flash tools like or Flash Drive Information Extractor , encountering the string Controller Part-Number: Unknown [FA00] paired with a firmware designation like F/W FA04 or similar can be incredibly frustrating.