If your operating system labels this device as "Unknown Device" despite the VID/VID being visible, it usually indicates that the USB enumeration process failed due to firmware damage. In this state, driver installation will not help. The controller itself is functioning enough to say "I am here," but the firmware (3613) is too corrupt to tell the computer what it is capable of doing.
[1] Alcor Instrument Co., “Cryo-transfer best practices,” Tech Note #204, 2022.
[2] J. Doe, Failure Analysis of W-CVD Residues, J. Microfab. 45(3), 210–218 (2023).
Finding that your USB drive is suddenly identified as an "Alcor Micro Unknown FA00 F/W 3613" usually indicates a firmware corruption or a "no media" error where the controller cannot communicate with the flash memory. This specific error string typically appears in low-level diagnostic tools like ChipGenius when the drive’s internal parameters are lost.
To restore a drive with these specific Alcor Micro identifiers, you must use a Mass Production Tool (MPTool) designed for low-level formatting and firmware flashing. Best Repair Tools for Alcor Micro FA00 F/W 3613
The most effective way to fix this "Unknown Device" error is to re-flash the controller using the correct version of AlcorMP.
AlcorMP (Mass Production Tool): This is the primary utility used to recover Alcor-based drives. Since your firmware reports as 3613 or FA00, you likely need a version compatible with AU698x series controllers. You can find these at the Alcor Micro Archive on USBDev.ru.
ChipGenius: Before downloading a repair tool, use the ChipGenius Utility to verify the exact Controller Part-Number (e.g., AU6989SN) and Flash ID. This ensures you download the specific AlcorMP version that supports your hardware.
FlashBoot.ru AlcorMP MD: A modified version of the standard AlcorMP that often includes better support for a wider range of VID/PID combinations and file systems like NTFS. It is available on FlashBoot.ru. Step-by-Step Restoration Guide
Recovering an "Unknown FA00" drive requires a specific sequence to prevent further errors like "Too many bad blocks".
Identify the Hardware: Run ChipGenius. Note the VID (usually 058F), PID, and Controller model.
Download the Matching Tool: Search for the AlcorMP version that lists your controller model. For firmware in the 36xx range, versions from 2013-2015 are often the most stable.
Prepare the Environment: Use a Windows 7 or 10 (32-bit) environment if possible, as these low-level tools often fail on 64-bit drivers due to signing issues. Configure AlcorMP: Open AlcorMP.exe. Click Setup (S).
Under the Flash Type tab, ensure the "Flash Brand" matches what ChipGenius reported.
In the Information tab, you can reset the VID/PID to their default values (e.g., 058F / 6387). Execute the Repair:
Plug in the USB drive. It should appear in one of the colored boxes in the tool.
Press Start (A). The process may take several minutes as it performs a "Low-Level Format" and re-maps bad sectors. Troubleshooting Common Errors
"30700: No Support Dual Channel": This usually means the AlcorMP version is too old for your specific high-capacity chip. Try a newer version from the 2020s.
"50400: Too many bad block error": The flash memory chip may be physically failing. You can try changing the ECC (Error Correction Code) setting in the Setup menu to a higher value (e.g., 12 or 15) to bypass minor hardware degradation.
Driver Issues: If the tool doesn't see your drive, run the AlcorMP.exe as an Administrator and ensure no other USB-intensive programs are running.
AlcorMP (Последняя версия ALCOR U2 MP v23.08.07.00.H)
Here’s a focused troubleshooting & repair guide for the Alcor Micro USB controller showing Unknown Device (FA00) with F/W 3613 (or similar).
This error usually means the controller is detected but can’t initialize properly — common on USB flash drives, card readers, or embedded storage.
When dealing with a corrupted Alcor controller where standard formatting fails, the "best" approach for repair involves using a Mass Production Tool (MPTool). This is specialized software provided by the manufacturer to reprogram the controller's firmware.
Warning: Using an MPTool will permanently erase all data on the drive. It is a last-resort solution for hardware recovery.
If you have landed on this page, you have likely just opened Device Manager on your Windows PC, only to be greeted by a glaring yellow exclamation mark next to a mysterious entry labeled "Unknown Device." Upon digging into the properties, you saw the Hardware IDs: USB\VID_058F&PID_FA00 or perhaps ALCOR_MICRO_UNKNOWN_FA00_F_W_3613. alcor micro unknown fa00 f w 3613 best
You are not alone. This specific string—"alcor micro unknown fa00 f w 3613 best"—is one of the most searched yet poorly documented hardware signatures on the internet. Users are desperate to find the best driver, the best fix, and the best way to get their hardware working again.
In this comprehensive guide, we will tear down exactly what this device is, why Windows labels it as "unknown," and the definitive best steps to resolve the driver issue for good.
The "Alcor Micro Unknown [FA00] - F/W 3613" error typically appears in diagnostic tools like ChipGenius when a USB flash drive's controller or firmware is corrupted
. This specific code indicates that the tool cannot identify the exact controller model or that the current firmware is malfunctioning. SanDisk Forums Understanding the Error Controller Vendor Alcor Micro is a common manufacturer of low-cost USB controllers Unknown [FA00] : This is a generic identifier that often points to the family of chips.
: This represents the currently flashed firmware version. If the drive is showing "No Media" or 0 bytes, this firmware is likely "crashed". SanDisk Forums How to Fix (USB Flash Drive Repair)
To fix this, you must use a specific flashing utility (MPTool) that matches your hardware's "Flash ID". Identify your Flash ID ChipGenius Flash Drive Information Extractor to find the 12-digit "Flash ID" (e.g., 453E98B3766B Download the MPTool : Visit sites like the Alcor MPTool Archive Alcor Infotech Downloads . Look for versions supporting the controllers. Configure the Tool Run the tool as an administrator.
If the tool detects your drive (often marked as "Cap: 0MB" initially), go to (password is often blank or
Select the correct Flash model based on the ID you found in step 1. Flash the Drive to begin low-level formatting and firmware re-installation. Warning: This will permanently erase all data on the drive. Success Rates & Risks
The string "alcor micro unknown fa00 f w 3613 best" likely refers to
a specific identification signature or status for a USB flash drive or card reader using an Alcor Micro controller Based on technical details related to Alcor Micro devices: Alcor Micro
: A manufacturer of semiconductor solutions, primarily for USB mass storage controllers and smart card readers. Unknown / FA00 : In Alcor recovery tools like
, "FA00" is often an error code or status indicating that the controller cannot recognize the flash memory (NAND) chip correctly or that the firmware is corrupted.
: This designates a specific firmware version (e.g., version 36.13) associated with the controller's production. : This usually refers to a configuration setting within the AlcorMP recovery software
(such as "Optimization: Best Capacity" or "Best Speed") used during the low-level formatting or "flashing" process. Driver Scape Potential Solutions If you are seeing this because a USB drive is not working: Driver Reinstall Device Manager
to uninstall the "Unknown USB Device" and scan for hardware changes. Recovery Tools : If the drive is corrupted, specialized utilities like
can be used to re-flash the firmware. Be aware that this typically erases all data on the device. Manufacturer Drivers
: For card readers, check support pages from manufacturers like DriverScape for official Alcor Micro USB Smart Card Reader drivers. Are you trying to recover a broken flash drive , or are you looking for a specific driver for a card reader? Alcor Micro - USBDev.ru
The identifier "Unknown FA00" with firmware (F/W) version 3613 refers to a specific state encountered when using recovery tools for USB flash drives powered by Alcor Micro controllers (such as the AU698x series). This usually happens when the software (AlcorMP) cannot fully identify the flash memory chip or the controller’s current state is corrupted. Best Tools for Recovery
To fix a drive showing "Unknown FA00" or "F/W 3613" errors, you must use a production utility (MPTool) that is compatible with your specific controller-memory combination.
AlcorMP (Standard Version): This is the primary utility for flashing Alcor USB 2.0 chips. You can find the latest versions, such as ALCOR U2 MP v23.08.07.00.H, on specialized sites like USBDev.ru.
AlcorMP MD (Modified Editions by nat27): These are often better for "unknown" errors because they include updated flash lists and additional driver support to force identification of generic or fake chips.
FCMPTool: Originally for counterfeit or "fake" drives, this tool is now largely integrated into modern AlcorMP versions but remains useful for drives that the standard tool refuses to recognize. Steps to Resolve "Unknown FA00 / F/W 3613"
Identify the Chip: Use a hardware info tool like ChipGenius or Flash Drive Information Extractor to find the exact Controller Model (e.g., AU6989SN) and Flash ID (FID).
Download Compatible Software: Locate a version of AlcorMP that explicitly lists your controller and memory type (e.g., MLC-8K, eD3, or TLC) in its description. Adjust Scan Settings: If your operating system labels this device as
If the drive is still "Unknown," go to the Setup menu (usually no password or "0000"). Change Scan Level to "Full Scan" or "High-level Format".
Set MP Mode to "Capacity Optimize" for the best chance of recovery.
Manual Driver Installation: If the tool does not see the drive, use the LoadDriver.exe utility (often found in the tool's folder) to manually install the Alcor bus driver for your specific VID/PID. Common Causes
Bad Sectors: If the tool shows "Bad Block" errors, the memory chip may be physically failing.
Wrong Software Edition: Alcor tools are highly specific. A version meant for eD3 memory will likely fail on TLC memory.
Write Protection: This "Unknown" state often triggers a write-protection error, which only a low-level format via these tools can clear.
AlcorMP (Последняя версия ALCOR U2 MP v23.08.07.00.H)
Here are a few post options tailored for different audiences: Option 1: The "Tech Support" Post (For Forums or Groups)
Headline: Stuck with Alcor Micro Unknown [FA00]? Here’s how to fix it! 🛠️
"If your USB drive is showing as 'Unknown [FA00]' with F/W 3613 in ChipGenius, your controller's firmware is likely corrupted. This doesn't always mean the drive is dead! How to revive it:
Identify the exact chip: Use tools like ChipGenius to confirm the VID/PID (usually 058F / 6387 or 1234).
Download the right MPTool: You’ll need the AlcorMP or ALCOR U2 MP utility. For [FA00] chips, versions like v20.09.16.00 are often recommended.
Flash the Firmware: Run the tool as an administrator, insert your drive, and hit 'Start'. Warning: This will perform a low-level format and erase all data.
Check out USBDev.ru or FlashBoot.ru for the specific firmware downloads." Option 2: The Short & Punchy (Social Media/Twitter style) "Is your USB drive ghosting you? 👻
Seeing 'Alcor Micro Unknown [FA00] F/W 3613' in your hardware report? This usually points to a corrupted AU6989SN controller.
Don't toss it yet! You can often reflashthe firmware using AlcorMP tools to bring it back to life. Just remember: flashing = total data wipe. 🛑 #TechFix #USBRepair #AlcorMicro #DataRecovery" Key Repair Resources:
Alcor Recovery Tool: A specialized utility for updating firmware on AU698x series controllers.
AlcorMP Instruction Guide: A detailed step-by-step on how to use production tools without bricking the device.
FlashBoot Database: Useful for finding the exact MPTool version based on your Flash ID code. ALCOR U2 MP v20.09.16.00 (6989SN-GTC/GTD/GTE/TA)
The identifier "Alcor Micro Unknown [FA00] - F/W 3613" typically refers to a USB flash drive that has suffered a firmware corruption or is a "fake" drive that the operating system can no longer correctly identify. When a drive displays this specific error, it often shows as "No Media" or "0 bytes" in Windows Disk Management. Understanding the Status
Alcor Micro: The manufacturer of the USB controller chip inside the drive.
Unknown [FA00]: This indicates that the software (usually AlcorMP) recognizes an Alcor controller but cannot identify the specific flash memory chip or its configuration.
F/W 3613: This is the current version of the firmware reported by the controller, though in a corrupted state, it may just be a generic placeholder. Best Methods for Recovery
To "fix" this drive, you generally need to perform a Mass Production (MP) tool flash, which overwrites the corrupted firmware with a fresh copy. Finding that your USB drive is suddenly identified
Identify the Controller: Use a tool like ChipGenius or Flash Drive Information Extractor to find the exact controller model (e.g., AU6989SN, AU6998) and the Flash ID.
Download AlcorMP: Visit specialized repositories like USBDev.ru to find the version of AlcorMP that supports your specific controller and flash memory type. Configuration for Best Results:
Low-Level Format: If the drive has bad sectors, select "Low Level Format" and set "Scan Level" to Full Scan 4 for the most thorough repair.
Optimize for Capacity: Use the "Capacity optimize" setting if you want to recover as much space as possible, or "Speed optimize" if you prefer stability.
ECC Settings: Adjusting the ECC (Error Correction Code) to a higher value (like ECC 15) can help the tool ignore minor physical defects in the memory chips. Common Issues & Tips
Driver Errors: If the software doesn't see the drive, you may need to install the specialized mpszfilt.sys driver included in the AlcorMP folder.
Single Channel Mode: If the firmware update fails repeatedly, try setting the tool to Single Channel mode. This may cut the drive's capacity in half but often allows it to function again if one of the memory channels is physically damaged.
Fake Drives: If your 64GB drive suddenly shows as "Unknown [FA00]" after filling it halfway, it is likely a programmed "fake capacity" drive that has hit its true limit.
Do you have the VID and PID numbers for this device (usually found in Device Manager) so I can help you find the exact version of the recovery tool?
Alcor Micro(安国)Unknown(未知) [FA00] - F/W 3613 64GB - 数码之家
whg8208 数码1段 ... 这个64G 识别为安国的U盘如何量产？ 现在里面写入了一个50G的光盘镜像，资料没有什么用，想恢复出这些空间来。 请大神们支个招，谢谢！ 数码之家
AlcorMP (Последняя версия ALCOR U2 MP v23.08.07.00.H)
The phrase "Alcor Micro Unknown FA00 F/W 3613" refers to a specific technical error report generated by USB diagnostic tools like ChipGenius when a USB flash drive's controller or firmware is corrupted. Understanding the Error
When a flash drive is unrecognized or displays "No Media" with 0 MB capacity, diagnostic software attempts to identify the hardware. Alcor Micro: The manufacturer of the USB controller chip.
Unknown [FA00]: This indicates that the tool cannot pinpoint the exact controller model, though "FA00" is often associated with the Alcor AU6989SN-TA or similar series.
F/W 3613: This refers to the specific firmware version (3613) currently on the controller chip. Best Repair Solutions
To fix a drive with these specific identifiers, you typically need "Mass Production" (MP) tools designed to re-flash the controller's firmware. 1. Identification via ChipGenius
Before attempting a repair, use ChipGenius to verify your "Flash ID" and "VID/PID" (usually VID 058F, PID 1234 for Alcor). This information is crucial for selecting the correct version of the repair utility. 2. Using Alcor MP Format Tools
The most effective way to restore these drives is through official recovery software:
AlcorMP (Mass Production Tool): Look for versions compatible with the AU6989SN series, such as ALCOR U2 MP v20.09.16.00 or higher.
Alcor Recovery Tool: Specifically designed for common Alcor chip controllers like AU6980 through AU6998.
Download Sources: Reliable repositories for these specialized tools include FlashBoot.ru and FlashDrive-Repair. 3. General USB Troubleshooting
If the software tools do not detect the drive, try these system-level fixes:
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