Hitta återförsäljare

Alcor Micro Unknown Fa00 F W Fa04 Fixed Best | 2025 |

The error message "Alcor Micro Unknown [FA00] - F/W FA04" indicates that your flash drive's controller (Alcor Micro) is stuck in a "no-FID" or uninitialized state, often appearing as "No Media" or with 0GB capacity. The Technical Fix: AlcorMP Tool

To fix this, you must "re-flash" the controller using the specific mass production tool that matches your chip. Identify the Chip: Use a tool like ChipGenius to find your exact Controller Part-Number (e.g., AU6989SN-TA) and Flash ID (FID) Download AlcorMP: Look for a version of that supports the

firmware codes. Common sources for these legacy tools include FlashDrive-Repair Configure the Tool: AlcorMP.exe If the drive isn't detected, click and enter the Flash Type

, ensure it is set to "Auto" or manually select the chip found in Step 1. Execute the Flash:

to begin the low-level format. This will erase all data but should "revive" the hardware and restore its capacity. Standard Recovery (If Hardware is Functional)

If the AlcorMP tool fails, try these standard Windows repairs: Diskpart Clean: Command Prompt select disk X

. This wipes partition errors that cause "unknown capacity". Driver Reinstall: Right-click the drive in Device Manager and select Uninstall Device

, then unplug and replug the drive to force Windows to reload the driver. Check Connections: alcor micro unknown fa00 f w fa04 fixed

Ensure you are using a direct USB port on the motherboard rather than a front-panel hub, which can sometimes provide insufficient power for firmware repairs. Do you have the exact Chip Controller number

from a tool like ChipGenius to find the specific firmware version you need?

It looks like you’re trying to interpret a string of text that seems to describe hardware or diagnostic data — likely related to Alcor Micro (a company that makes USB hub controllers, card readers, and other ICs).

Let me break down the possible meaning based on the structure:

Text:
alcor micro unknown fa00 f w fa04 fixed

Possible interpretation:

5. Recommended Actions (if you are trying to repair the drive)

  1. Identify exact controller – Open the drive or use ChipGenius / USBDeview to get VID/PID (likely VID_058F Alcor).
  2. Use correct AlcorMP version – Wrong version will show FA00 or Unknown.
  3. Check flash chip markings – If visible, match with tool’s FA04 profile.
  4. Apply “FA04 fixed” in MP tool:
    • In settings → Flash Selection → choose FA04 if listed.
    • Set Mode = Fixed (not removable).
    • Set capacity manually if auto-detect fails.
  5. Low-level format – Use “Start (F9)” or “Format” in AlcorMP.

Conclusion: "Unknown" Does Not Mean "Hopeless"

The "Alcor Micro Unknown FA00 F/W FA04 Fixed" error is one of the most common, frightening, and misunderstood USB drive failures. It looks like a hardware brick, but it is almost always a firmware seizure. The error message "Alcor Micro Unknown [FA00] -

To summarize the fix:

You are now equipped with the knowledge to turn that "Unknown" yellow-banged device back into a functional storage drive. The era of throwing away USB drives because of the FA00 error is over.

Final Pro Tip: Bookmark this article. If you search for "Alcor Micro Unknown FA00" again in the future, remember – the solution lies in the FA04 firmware and the right MPTool.

Disclaimer: This guide is for educational purposes. Modifying USB firmware carries risk. Always back up critical data to multiple locations. The author is not responsible for data loss incurred during DIY repair.

Keywords: Alcor Micro unknown FA00, FA04 fixed, Alcor MP tool, USB drive not detected, FA00 PID fix, AU6989 recovery, flash drive firmware repair, Alcor unknown device.

When Does This Happen?

You typically see this error after:

  1. Unsafe removal: Yanking the drive out while writing data (especially during a format or partition operation).
  2. Power fluctuation: A sudden voltage drop or surge while the drive was active.
  3. Failed firmware update: Attempting to flash new firmware that was incompatible.
  4. Physical wear: The NAND cells degraded, and the controller’s translation layer crashed.

Crucial distinction: If you see "FA00," your drive is not physically dead. The hardware is alive. The controller is responding to the USB bus (hence why Windows sees it). The problem is logical/software-based. "alcor micro" – Alcor Micro Corp

Unknown FA00

In the USB specification, every device has a Vendor ID (VID) and Product ID (PID) . Normally, a healthy Alcor drive will show something like VID_058F PID_6387. However, FA00 is a special "fallback" PID. When the controller’s firmware is corrupted, missing, or has entered MPTool (Mass Production Tool) mode, it defaults to FA00 to signal to the PC that it is ready for low-level formatting or firmware re-flashing. It is not a hardware death rattle—it’s a cry for help.

2. Symptom: Unknown FA00

When connecting the device, system tools (e.g., USB Device Tree Viewer, ChipGenius, or Alcor’s own diagnostic utilities) may report:

The FA00 code typically indicates:

4. Why This Matters

This issue serves as a case study in USB Device Enumeration. USB devices are supposed to self-identify. However, complex composite devices (like card readers that handle SD, CF, and xD cards) often rely on software stacks to function.

When Windows Update pushes a generic "USB Mass Storage" driver to an Alcor device, the device enters a logic trap:

The "FA04 Fix" restores the vendor-specific handshake, allowing the hardware to resume normal operations.