This updated technical article outlines how to re-flash and revive an Alcor Micro drive exhibiting these symptoms. Technical Overview of the [FA00] Error
If you see that, it's definitely an Alcor FA00 device.
: A hex status code signaling that the controller chip is functional, but its microcode has lost track of the connected storage geometry.
After hours of trial and error with unofficial firmware, he finally found a match. He loaded the ALCOR MP software, set the configuration to "Factory Mode," and hit start. The status bar crawled for nearly three hours as the software "stitched" the 64GB drive back together. alcor micro unknown fa00 f w 3613 updated
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: This identifies the manufacturer of the USB controller chip . Alcor Micro (also known as 安国) is a Taiwanese fabless semiconductor company that designs, among other things, the controller chips that manage data flow on many USB flash drives.
Download a specialized hardware query tool such as or Flash Drive Information Extractor . Plug in the faulty USB drive and run the tool. This updated technical article outlines how to re-flash
This technical guide breaks down exactly why this firmware corruption happens and provides step-by-step instructions to revive your USB flash drive using updated mass production software. Why the "Unknown FA00 F/W 3613" Error Occurs
Some older Alcor FA00 drivers are unsigned. On Windows 10/11: Restart → Advanced startup → Disable driver signature enforcement → install driver manually.
Wait for the process to finish. The status bar will turn green and display "OK" upon success. If it turns red, the tool will provide an alternate error code (such as "Bad Block Error" or "No Flash Detected"). What to Do If the Software Flash Fails After hours of trial and error with unofficial
: This is the Controller Part-Number , which is specific to the chip itself. The "Unknown" label is common when the software cannot definitively map FA00 to a known model. However, community experience indicates that FA00 is typically used for Alcor controllers in the AU6989SN series, such as the AU6989SN-TA or AU6989SN-GT.
Windows has a built-in generic USB mass storage driver. Sometimes it just needs a nudge.