He bypassed the GUI and went into the kernel command line. He didn't try to open the file; he tried to read the raw hex code. He wanted to see the binary skeleton.
: Download the ChipGenius utility to check the "Controller Vendor" and "Controller Part-Number."
Search for "AlcorMP AU87101A" or "Alcor Micro UFD Create Tool." Look for versions specifically labelled for High-Level Format if you want to save the hardware, or Low-Level Format for a factory reset. 3. Configure the Tool for "Full" Error
AU87101A wasn't a drive you could just swap out. It was the legacy partition—the 'Attic'—sitting on a rack of hardware that predated the cloud, predated the company’s IPO, and arguably predated modern sanity. It was supposed to be dormant. It was supposed to be empty. au87101a ufdisk full
Before jumping to technical fixes, it helps to understand why your premium flash drive (such as models from Netac, Transcend, or Kingston) suddenly calls itself an "AU87101A UFDISK":
If this article helped you bring a critical industrial, medical, or telecom system back to life, share your experience in the comments — your specific device model and ufdisk version may help others facing the same cryptic alert.
The is a specific Alcor Micro USB controller often found in generic or unbranded flash drives. When these drives encounter errors like showing "0 bytes," "No Media," or "Write Protected," specialized low-level formatting tools like uFDisk or Alcor Micro's proprietary recovery software are used to "re-mass" (factory reset) the controller. Recovery Guide for AU87101A USB Drives He bypassed the GUI and went into the kernel command line
The "full" condition is not merely about running out of user data space. In low-level storage utilities like ufdisk , "full" can indicate:
Linux:
In the optimization tab, change the setting from "Speed Optimize" to Capacity Optimize . Under Scan Level options, select Full Scan . This forces the tool to check for dead sectors and rebuild a healthy partition map. : Download the ChipGenius utility to check the
Because the drive is detected by the system at a hardware level (the USB controller is talking to the PC), the issue is almost certainly recoverable. You do not need specialized hardware.
This specific string indicates that your flash drive's physical controller chip—manufactured by —has entered a panic mode or safe state. The controller has lost communication with its NAND flash memory chips or its internal firmware has corrupted. Windows can see the chip itself ( AU87101A ), but it reads the storage capacity as 0 bytes, raw, or falsely claims the capacity is completely full.
Download ChipGenius or Flash Drive Information Extractor . Confirm that the Controller Vendor is Alcor Micro and the Controller Part-Number is AU87101A.
Typical reformat command:
error and how to use the Alcor Micro Mass Production Tool (MPTool) to repair it. What is the AU87101A UFDISH Controller? Go to product viewer dialog for this item.