This indicates that the active firmware block inside the controller has hit a fatal exception loop. Because the firmware is unstable, it fails to initialize the hardware pins connecting to the physical storage.
Download a diagnostic utility such as or Flash Drive Information Extractor (FDIE) . Plug in the faulty USB drive and run the tool. Document the following outputs: Controller Vendor : Alcor Micro Controller Part-Number : e.g., AU6989SN-TA
90% of the time, the FA00/FA04 is an OEM Smart Card Reader.
In the tool settings, try setting to "Low Level Format" and MP Mode to "Capacity Optimize". Warning : This process will erase all data on the device. 4. Disable USB Selective Suspend alcor micro unknown fa00 f w fa04 work
The most reliable solution for FA00/FW04 issues is to use Alcor's Mass Production (MP) Tool, often called AlcorMP. These official utility software packages are designed to create, repair, configure, and restore Alcor-based USB flash drives to their factory state.
A: Not necessarily. It often means the tool doesn't have the correct configuration for that specific flash chip. Try a different tool version, manually select the flash ID, or seek help from online communities.
Use the clean command in Windows Diskpart to wipe partition information and re-create a primary partition. This indicates that the active firmware block inside
One report details a 128GB PNY Pendrive that would drop to zero speed and show Controller Part-Number: Unknown [FA00] – F/W F004. The user was dealing with a Micron QLC flash chip. Another report highlights a 32GB drive that was recognized but would not mount, showing the FA04 firmware signature. A third user on a Russian forum struggled with a metal, unopenable flash drive, trying multiple versions of AlcorMP without success.
When a USB flash drive goes completely unresponsive, Windows usually reports it as an , displays "No Media" with 0 bytes of storage , or triggers a "Disk is Write-Protected" error . If you analyze the broken flash drive using a hardware diagnostic tool like ChipGenius, you will likely see a specific, frustrating controller status: Controller Part-Number: Unknown [FA00] - F/W FA04 .
For FA00 controllers, Full Scan4 (AutoECC) is often the most reliable for bypassing firmware "Unknown" errors. 4. Execute the Flash Plug in the faulty USB drive and run the tool
Copy and save the exact and PID (Product ID) values (e.g., VID = 058F , PID = 6387 ). You will need these to configure your firmware tools later. Step 2: Source the Matching Mass Production Tool (MPTool)
: Common repositories for these tools include specialized sites like FlashDrive-Repair 3. Repair Procedure (Mass Production) : This process will permanently erase all data on the flash drive. Launch AlcorMP : Run the application as an administrator. Configure the Driver button in the tool. Enter your ) and click "Add VID/PID" Connect the Drive : Plug in your USB stick. If it isn't detected, click "Refresh (R)" Settings Adjustment (leave the password blank if prompted). "Auto Disc Size" is selected and "Lead Normal On" is ticked. "Factory Mode" for a full reset. Start Flashing