Alcor Micro Unknown Fa00 F W Fa04 Work __exclusive__ May 2026

The identifier Unknown [FA00] — F/W FA04 (or similar variations like FA02) typically indicates that a USB flash drive with an Alcor Micro

  1. Legacy Hardware: Many of these card readers are slightly older hardware revisions. While Windows 10 and 11 are excellent at finding drivers automatically, they sometimes miss specific proprietary controllers like the Alcor FA00 series if the generic Microsoft driver database doesn't match the specific Hardware ID (PID_0039).
  2. Generic Drivers: Windows might try to install a generic USB driver, but it fails to initialize the specific read/write protocols of the Alcor chip, leaving the device "bricked" in Device Manager.

Will It Ever Work 100%?

Yes, but with a nuance:

After cross-referencing with multiple driver databases (Microsoft Update Catalog, PCI ID Repository, and Linux lsusb dumps), the Alcor Micro FA00/FA04 device maps most frequently to: alcor micro unknown fa00 f w fa04 work

Once the tool detects your drive (often showing a colored box), click Setup (S). If prompted for a password, leave it blank or try "0000". The identifier Unknown [FA00] — F/W FA04 (or

Select Add VID/PID and Save InstallDrive to ensure the tool can hook into the device. Legacy Hardware: Many of these card readers are

  1. Sending a reset command to the FA00 interface (via ioctl on Linux or DevIoControl on Windows).
  2. Triggering a logical re-enumeration – which reinitializes the second LUN without physically removing the USB plug.

How to fix (if data不重要):

  1. Identify exact chip using ChipGenius (Windows) or lsusb -v (Linux).
  2. Download the correct Alcor MPTool (e.g., AlcorMP_UFD or AlcorMP_AU698X). Version must match your chip.
  3. In the tool, look for FA00 or FA04 under "Status" – this often means "Pretest fail" or "Bad block".
  4. Short the flash pins (if hardware dead) – last resort.
  5. Use Low-level format in MPTool (but this erases all data).

Step 1: Verify the Hardware ID (Do Not Trust Labels)

Do not rely on "Alcor Micro" as a name. In Device Manager: