If your drive remains completely unresponsive (not even showing up in lsusb ), it may be physically dead. However, some advanced users can attempt a "bridge short" reset. This is a last-resort hardware hack for Alcor controllers:
Executing an image rewrite overwrites the internal flash tables completely. Step 3.1: Configure Windows Environment
Note: The processing sequence may take anywhere from 15 minutes to several hours depending on the physical storage size and underlying controller communication speeds. Do not disrupt power or remove the flash drive during this window. When to Consider Hardware Replacement
When this happens, the operating system registers the device as an empty card reader or throws a false "Disk is Full/Write Protected" exception. Standard format commands fail completely.
This is the most severe scenario, usually indicating a dead controller or a serious firmware failure. The controller is no longer able to respond to basic USB enumeration commands. au87101a ufdisk full
If your initial ChipGenius diagnostic reveals that your controller framework hasn't fully desynchronized yet, you might be dealing with a basic software-level attribute lock instead of corrupted microcode. Try clearing it via the command prompt before attempting a firmware flash.
Systematically maps bad cell groupings to stop storage read hanging. Capacity Optimize
Includes built-in regulators, crystal-less design, and support for In-System Programming (ISP) for firmware upgrades. UFD Utility (UDisk Full) Software
You need an Alcor MPTool version that explicitly supports the AU87101A. You can find these on specialized repository sites like USBDev.ru. Search for "Alcor AU87101" to find the correct, most recent version. 2. Prepare the Device If your drive remains completely unresponsive (not even
: Use Windows' built-in DiskPart tool to wipe the partition configuration. Open Command Prompt as Admin. Identify your USB drive number and type select disk X (replace X with your number). to remove all partition information. Check for Physical Write-Protection
The AU87101A is frequently identified by diagnostic tools like ChipGenius . In some cases, it may be a misidentified version of the controller. Repair Tools:
Check if your specific drive has a physical "Lock" slider on the side. Using the UFDisk Utility
If the tool runs but the drive still shows 0 bytes: Step 3
Choose to overwrite deeply corrupted cells. Change the optimization style to Capacity Optimize .
Try these first to see if the error is just a logical file system issue.
(The exact NAND string, vital for memory configurations). Step 2: Clear Soft Write-Locks via Diskpart
Use a clean GPT (recommended) or MBR if needed.