Alcor Micro Unknown Fa00 F W Fa04 Top May 2026

The FA00 chip is often a masked variant of the AU6370 or AU6371 series. You can try the driver for those:

If you spend enough time digging through Windows Device Manager, Linux terminal outputs, or obscure hardware forums, you will eventually stumble across a string of text that looks less like a device name and more like a secret code.

One of the most elusive of these is the string: "Alcor Micro Unknown FA00 F W FA04 Top".

It doesn't roll off the tongue. It isn't in the manual. If you try to Google it, you might only find a handful of confused users asking, "What is this?" and "Why is my CPU usage spiking?"

Today, we’re putting on our detective hats. We’re going to decrypt this alphanumeric soup, figure out what this piece of silicon actually does, and tell you whether you should care.

The string "alcor micro unknown fa00 f w fa04 top" is not a virus, not a conspiracy, and certainly not a sign that your PC is broken. It is simply a legacy USB controller chip caught between functional fallback mode and missing driver support.

Your best bet:

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.

Further reading & tools:

Have you solved your Alcor FA00 issue? Share your experience in the comments below.

If your computer reports this exact "Unknown [FA00]" status, it typically indicates that the drive’s firmware is corrupted, the controller is entering a "test mode," or you are dealing with a counterfeit device. What Does the Identifier Mean?

When a flash drive's internal software (firmware) crashes, it stops identifying itself correctly to Windows. Tools designed to read the hardware details will then report the following:

Controller Vendor: Alcor Micro (a common manufacturer of USB controllers).

Controller Part-Number: Unknown [FA00] — This means the diagnostic tool cannot find a matching chip in its database, or the chip is reporting a generic "fail" code.

F/W (Firmware): FA04 — This refers to the version of the low-level instructions currently active on the chip. Common Causes of the "FA00" Error

Firmware Corruption: The most frequent cause. A sudden power loss or improper ejection can "scramble" the firmware, making the drive appear as "No Media" or "Unknown Device".

Controller Malfunction: The Alcor AU6989SN-GT or similar series controllers sometimes default to this "FA00" state when they cannot communicate with the NAND memory chip.

Fake/Counterfeit Drives: Many "high capacity" cheap drives use Alcor controllers. If the fake capacity is exceeded, the controller may crash and report an unknown status. alcor micro unknown fa00 f w fa04 top

Hardware Damage: If the physical connection between the controller and the memory chip is broken, the controller has nothing to report but a generic error. How to Fix Alcor Micro [FA00] Firmware Issues

Fixing this requires "re-flashing" the controller using Mass Production (MP) Tools.

Warning: Using these tools will permanently erase all data on the flash drive. 1. Identify the Real Chip

Since the "FA00" code is generic, you need the Flash ID (FID) 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

Search for the specific version of the Alcor MP tool that supports your Flash ID. Reliable repositories for these specialized tools include: Alcor Micro - USBDev.ru

The identifier Alcor Micro [FA00] typically refers to the Alcor AU6989SN-TA

(or AU6989SNCS-TA) USB controller. This specific firmware string usually appears in diagnostic tools like ChipGenius or AlcorMP when a flash drive is corrupted, showing "No Media" or "0 Bytes". Understanding the Codes : This is the controller ID, often linked to the AU6989SN-TA : Refers to the current firmware version (FA04) flashed onto the controller. Unknown / No FID

: This status indicates that the mass production (MP) tool cannot identify the Flash ID (FID) of the memory chip, meaning the controller is working but cannot communicate with the NAND memory. Potential Fixes for Corrupted Alcor Drives

If your drive is showing these "Unknown" or "0 Byte" errors, you likely need a specific repair utility to re-flash the firmware: Identify the Exact Hardware : Use a tool like ChipGenius to confirm your VID (usually ) and PID (usually Download AlcorMP (Mass Production Tool) Search for a version compatible with the AU6989SN-TA controller. Reliable community repositories like host various versions of the Alcor Micro MP tools. Basic Troubleshooting Registry Edit : Clear write protection attributes via

or the Registry Editor if the drive is recognized but "Write Protected". Hardware Check

: If the MP tool still shows "No FID," the physical connection between the controller and the memory chip might be broken. Content Draft for Technical Support/Forums

If you are asking for help on a technical forum, use this format:

: Help Needed: Alcor Micro [FA00] Unknown Firmware FA04 - 0 Bytes Error Device Info Controller Alcor AU6989SN-TA (ID: FA00) : 058F / 1234 (or your specific codes)

: The drive is recognized by the system but shows "No Media" or "Unknown" in AlcorMP. Flash ID is not being detected.

If you're staring at an "Unknown [FA00]" error with a firmware version like FA04 in your AlcorMP tool, you've likely hit a common wall in USB repair. This specific identifier usually appears when the Alcor Micro

controller fails to communicate with the flash memory chip, often due to a corrupted firmware or a physical connection issue. Understanding the "Unknown [FA00]" Error

When AlcorMP displays [FA00], it means the software cannot identify the Flash ID (FID) of the memory chip. This happens for a few reasons:

Hardware Malfunction: The connection between the controller (like an AU6989SN-TA) and the NAND flash is broken.

Incompatible Software: You are using a version of AlcorMP that doesn't support your specific chip combination. How to Fix the FA00/FA04 Error

To resolve this, you need to force the controller back into a "programmable" state using a specific workflow:

Identify Your Chipset: Before downloading tools, use a utility like ChipGenius to find your actual Controller Model (e.g., AU6989) and Flash ID. Use the "Driver" Setup: Open AlcorMP and click the Driver button.

Manually enter your device's VID and PID (often 058F and 1234 for Alcor) and click Add.

Try "Test Mode": If the software still says "Unknown," you may need to physically short the pins on the NAND flash chip while plugging it in. This forces the controller into a "test mode" where it can accept new firmware regardless of the current state.

Download the Right Tool: Check repositories like USBDev.ru for specialized versions of AlcorMP. Look for "L74" or "D2" editions if your flash memory is from Micron or Toshiba. Quick Checklist for Repair

Change Ports: Always use a USB 2.0 port on the back of your PC motherboard. Front-panel ports or USB 3.0 ports often cause communication failures during low-level formatting.

Low-Level Format: In AlcorMP settings, select "Low Level Format" to completely wipe and rebuild the bad sectors on the chip.

Check for Fakes: If a 16GB drive suddenly shows as 4GB after repair, you likely had a "Frankenflash"—a fake-capacity drive that has been restored to its true, smaller size.

Still getting the error? You might need to try a different version of AlcorMP or Alcor Recovery Tool specifically matched to your controller's production year.

Based on technical data and user reports from and community forums like

, the "Alcor Micro Unknown FA00" with firmware FA04 is a specific hardware/firmware signature often associated with generic or unbranded USB flash drives. Overview of Alcor Micro FA00 / FA04 The "FA00" identifier typically points to the Alcor AU6989SN-TA AU6989SNCS-TA

controller series. Seeing "Unknown" alongside this code usually indicates that the diagnostic tool cannot fully communicate with the chip, often due to firmware corruption or physical defects. Key Technical Profile Controller Model: Generally identified as AU6989SN-TA Common Issues:

Drives with this signature frequently report "0 Bytes" capacity or "No Media" in Windows. Performance:

These controllers are typically used in budget, USB 2.0 mass storage devices. Recoverability:

Repairing these drives usually requires specialized Alcor Micro Mass Production Tools (MPTools) to reflash the firmware. Review Summary Status / Rating Reliability

This specific signature is frequently reported in context of "dead" or corrupted drives. Identification Difficult. Further reading & tools:

Diagnostic tools often list it as "Unknown" because the internal Flash ID (FID) may be missing or invalid (e.g., 898989898989 Versatility

While the controller itself is a standard budget part, the "Unknown FA00" status makes it unusable until manually reflashed. Final Verdict: If your device shows this signature, it is likely in a failed state

. It is not a specific "model" of a high-end drive, but rather a low-level identification of a budget Alcor controller that is currently missing its configuration data. Are you trying to recover data from this drive or simply trying to it to make it usable again?

Alcor AU6989SN-TA Firmware Issues | PDF | Usb Flash Drive - Scribd

The Mysterious Alcor Micro Chip

In the heart of the bustling city, there was a small, unassuming office tucked away in a nondescript building. The sign on the door read "Alcor Micro Systems," and the company was known within the tech community for producing high-quality, cutting-edge microchips. However, there was one particular chip that remained shrouded in mystery: the FA00 F/W FA04.

Rumors swirled among engineers and tech enthusiasts about the FA00's capabilities. Some claimed it was a revolutionary new processor, capable of speeds that would leave even the most advanced computers in the dust. Others whispered that it was more than just a chip – it was a key to unlocking new possibilities in artificial intelligence.

The company's CEO, a reclusive and enigmatic figure named Dr. Elara Vex, was tight-lipped about the FA00. When questioned about the chip, she would only smile and say that it was "still in development." But as time went on, whispers began to circulate that the FA00 was not just a product, but a gateway to something much larger.

One stormy night, a young and ambitious journalist named Maya decided to investigate further. She had heard rumors of a secret laboratory hidden deep within the Alcor Micro building, where the FA00 was being tested. Determined to get to the bottom of the story, Maya snuck into the building, avoiding security guards and dodging through dimly lit corridors.

As she made her way deeper into the complex, she stumbled upon a door labeled "Authorized Personnel Only." Her heart racing, Maya pushed the door open and found herself in a small, windowless room filled with rows of humming servers and workstations. In the center of the room, a single computer terminal sat idle, with a label that read "FA00 F/W FA04."

Maya's eyes widened as she approached the terminal. Suddenly, the screen flickered to life, displaying a cryptic message: "Initialization sequence complete. Awaiting authorization code." Maya's mind racing, she realized that she had stumbled into something much bigger than she had ever imagined.

Just as she was about to investigate further, the lights in the room began to flicker, and the air was filled with the sound of footsteps. Dr. Vex appeared, a hint of a smile on her face.

"Welcome, Maya," she said. "I see you've discovered our little secret. The FA00 is indeed a special chip – one that has the potential to change the course of human history. But it's not just a product; it's a key to unlocking the true potential of the human mind."

As Maya listened, Dr. Vex revealed that the FA00 was part of a much larger project – a neural interface that would allow humans to connect directly to computers, blurring the lines between man and machine. The FA00 was the first step towards making this vision a reality.

Maya left the Alcor Micro building that night with a newfound sense of wonder and awe. She realized that sometimes, the most incredible stories are the ones that are hidden in plain sight, waiting for someone brave enough to uncover them. And as she looked up at the stars, she couldn't help but wonder – what other secrets lay hidden in the shadows, waiting to be uncovered?

Given the specificity of the terminology, it seems this phrase might relate to:

Without more context, it's challenging to provide a precise explanation or utility of "Alcor Micro Unknown FA00 F W FA04 Top." However, if you're dealing with a USB flash drive or similar device:

If you have a more specific context or technical details about the device or system you're working with, it might help in providing a more targeted and useful response.