Alcor Micro Unknown Fa00 F W Fa04

When your computer identifies a USB drive as "Alcor Micro Unknown FA00 F/W FA04," it indicates that the firmware on your Alcor Micro controller (typically the AU6989SN series) has become corrupted or is in an uninitialized state. This error often manifests as a "No Media" or "0 Byte" capacity issue. Understanding the FA00 F/W FA04 Error

The code "FA00" typically refers to the controller ID or its status in a recovery mode, while "F/W FA04" identifies a specific (often factory or fallback) firmware version. This most commonly occurs on flash drives from brands like Transcend, Kingston, or generic manufacturers that use Alcor chips. Step-by-Step Repair Guide

To fix this, you must use a specialized "Mass Production Tool" (MPTool) to re-flash the controller's firmware. 1. Identify Your Specific Hardware

Before downloading software, you must confirm your hardware details using ChipGenius.

Controller Part Number: Look for something like AU6989SN-GT. Flash ID (FID): A code like AD 3A 14 AB 42 4A. VID/PID: Standard Alcor IDs are usually 058F and 6387. 2. Download the Correct AlcorMP Tool

The most reliable source for these utilities is USBDev.ru. For "FA00" errors, you should look for the latest versions of AlcorMP (UFD) or ALCOR U2 MP.

Recommended Versions: Look for versions released after 2018, such as AlcorMP 16.11.01.MD or newer, as they have better support for 98-series controllers. 3. Configuring and Running the Tool

Flashing firmware will permanently erase all data on the drive. alcor micro unknown fa00 f w fa04

Preparation: Use a 32-bit Windows system (Windows 7 is often the most compatible) if possible.

Launch: Open the utility (e.g., AlcorMP.exe) and then plug in the USB drive.

Setup: Click Setup (S). If prompted for a password, leave it blank. Scan Settings: Set Scan Mode to "Low Level Format" for a deep repair. Set AdjustPower to 500MA.

If the drive has many bad sectors, select "Capacity Optimize" under MP Mode.

Start: Click Start (A). This process can take anywhere from 30 minutes to 3 hours depending on the drive's capacity. Troubleshooting Common MPTool Errors

30700: No Support Dual Channel: Your firmware version doesn't support the specific flash memory layout; try a different MPTool version.

50400: Too Many Bad Blocks: The hardware may be physically damaged beyond repair, though you can try "Half Capacity Check" in the settings to salvage partial storage. When your computer identifies a USB drive as

Device Not Found: Ensure your VID/PID is correct. If they are 0000/7777, use the Alcor Change PID/VID Rework tool first to reset them to defaults.

Deconstructing the Keyword: "alcor micro unknown fa00 f w fa04"

The keyword phrase itself tells a story. Let’s break it down:

• "Alcor Micro" : The manufacturer and device family.
• "Unknown" : Windows cannot identify the device. This usually appears as "Alcor Micro Unknown Device" or "Unknown USB Device (Device Descriptor Request Failed)."
• "FA00" : This is likely a Product ID (PID) or a firmware error code. In the context of Alcor controllers, FA00 often appears when the chip has entered a low-level recovery mode because its primary firmware is missing or corrupted.
• "F" : Could refer to "Flash" (NAND flash memory) or "Fail." In some logs, it denotes a failure in the first programming block.
• "W" : Typically stands for "Write" – indicating a write operation failure, or "Wait" – meaning the device is stuck in a waiting state.
• "FA04" : This is another status code. While FA00 suggests a missing firmware, FA04 often points to a hardware initialization failure—such as a bad NAND flash connection, a short circuit, or a completely dead memory chip.

When users search for FA00 or FA04 alongside "Alcor Micro," they are usually looking at the Hardware Ids in Device Manager (under Details tab), which might look like USB\VID_058F&PID_FA00 or USB\VID_058F&PID_FA04.

Important: The standard Alcor Micro vendor ID is VID_058F. A PID of FA00 or FA04 is not a normal, functional device ID. A healthy Alcor card reader might show PID_6366 or PID_9370. Seeing FA00 or FA04 means the device is in a "pre-boot" or "panic" state.

2. The "Unknown FA00" Identifier

In the context of hardware detection tools (like lsusb on Linux or Windows Device Manager), the string FA00 is a crucial part of the USB Vendor ID (VID) and Product ID (PID) pair.

• Vendor ID: 058F (Alcor Micro)
• Product ID: FA00

The label "unknown" often appears in hardware lists because this specific Product ID (FA00) is used for generic OEM (Original Equipment Manufacturer) hardware. Unlike branded peripherals that have specific names in a driver database (e.g., "Logitech Mouse"), generic card readers often show up as "Unknown" or "Generic" until a specific driver is installed or the device class is identified.

Scenario A: Device Not Recognized / "Unknown Device"

If the drive is not mounting or showing up with a drive letter: "Alcor Micro" : The manufacturer and device family

1. Check USB Port: Try a different USB port. USB 3.0 ports sometimes have compatibility issues with older Alcor 2.0 controllers.
2. Disk Management (Windows):
   • Right-click the Start button > select Disk Management.
   • Look for a disk with "Unallocated" space or a black bar.
   • If found, right-click and create a New Simple Volume. This resolves issues where the file system is corrupted.
3. Driver Update:
   • Open Device Manager.
   • Look under "Universal Serial Bus controllers" or "Other devices".
   • Right-click the unknown device > Update driver > Search automatically for drivers.

1. alcor micro

• Alcor Micro is a Taiwanese semiconductor company known for making USB flash drive controllers (e.g., AU698X, AU699X, SC908, AU9368, etc.).
• Their controllers are common in budget/off-brand USB drives.

Technical White Paper: Analysis of the "Alcor Micro Unknown FA00 F W FA04" Device

Author: Technical Support Team Date: October 26, 2023 Subject: Device Identification, Driver Troubleshooting, and Hardware Specifications

3. Hardware Failure (Physical Damage)

The FA04 code is a red flag for hardware. This often means the controller tried to communicate with the NAND flash and received no response. Possible causes include:

• A cracked solder joint on the USB drive’s circuit board.
• A failed quartz crystal oscillator (the 12MHz or 24MHz crystal near the Alcor chip).
• Voltage regulator failure (no 3.3V or 1.8V reaching the NAND).

Q1: Is "Alcor Micro Unknown FA00 F W FA04" a virus?

No. It is a hardware/firmware error, not malware. However, a virus could have caused the corruption by writing erratic data to the drive.

What is Alcor Micro?

Before diving into the error codes, it is essential to understand the manufacturer. Alcor Micro Corp. is a Taiwanese semiconductor company specializing in USB controllers, card readers, and keyboard/mouse control chips. They are rarely a household name, but their hardware is ubiquitous.

If you own a cheap, no-name USB 2.0 flash drive, a multi-format SD/MMC card reader, or a laptop’s internal memory card slot, chances are it is powered by an Alcor Micro chip. The most common controller models include the AU698X, AU699X, AU647XX, and SC908 series.

The problem arises because Windows does not inherently know how to communicate with these chips without the correct driver—or if the firmware on the chip has become corrupted.