: Use a tool like ChipGenius or Flash Drive Information Extractor to find the actual Controller Part-Number and Flash ID (FID). Download the Correct Utility :
If your Device Manager shows with a PID of FA00 or FA04 , follow these steps in order.
Generally indicates a specific firmware version mismatch or a hardware-level read failure during the initialization process. How to Fix Alcor Micro "Unknown Device" Errors 1. Locate the Correct Production Tool (AlcorMP)
Save the configuration, return to the main screen, and click .
when a USB drive's controller (the "brain") is stuck in a low-level error state. The Controller : "FA00" is frequently an alias for the Alcor AU6989SN-TA alcor micro unknown fa00 f w fa04
Standard Windows drivers will not fix a firmware-level "Unknown Device" error. You must use a "production tool" specifically designed for Alcor chips.
The keyword describes a USB storage device with an Alcor Micro controller whose firmware has failed or is inaccessible, causing Windows to label it as an unknown device with error status FA00/FA04.
Let’s unmask it.
Get the latest copy of to read raw hardware registers without relying on Windows drivers. Step 2: Configure the Alcor MP Environment : Use a tool like ChipGenius or Flash
Locate the Alcor controller chip (the smaller chip with pins on all four sides).
From user reports across forums, this ID shows up most often on:
This is a device ID often associated with the Alcor AU6989SN-TA or similar controllers. It suggests the device is in a temporary "boot mode" or has lost its firmware identification.
: If present, it will look like EC 5C 98 BF 84 CC (Samsung/Toshiba/Micron). If it says "No FID" or "Unknown," software-only flashing may fail until hardware test-mode is forced. Step 2: Download the Correct Production Tool How to Fix Alcor Micro "Unknown Device" Errors 1
Open AlcorMP.exe . If the device is detected as "Unknown" or shows a 0MB capacity, go to Setup .
The Alcor chip itself might be overheating, have cracked solder joints, or have a failed quartz crystal oscillator. The "FA00" code sometimes means the controller is alive but cannot maintain a stable clock signal.
This error often occurs when the firmware (F/W) on the device becomes corrupted, or when Windows fails to identify the controller correctly, rendering the drive unreadable, "Write Protected," or showing a capacity of 0 bytes.