Comprehensive Guide to AU87101A and Alcor Micro UFDisk Repack: USB Controller Repair & Customization The AU87101A microcontroller Go to product viewer dialog for this item.
Provides granular data regarding physical NAND flash memory, including the Flash ID (FID), architecture type (SLC, MLC, or TLC), and internal channels. Key Hardware Specs to Note
Not every corrupted flash drive can be saved. If after trying multiple repacks and mass production tools your drive still does not function correctly, it may be suffering from genuine hardware failure, such as:
: The device also reports a unique USB identifier (Vendor ID/Product ID). For the AU87101A, this is typically reported as VID_058F & PID_1234 [19†L9], which corresponds to an Alcor Micro Corp. Flash Drive.
The controller cannot read the flash mapping. au87101a ufdisk repack
The AU87101A is a controller chip—the "brain" of a USB drive. When a drive becomes "write-protected," shows "no media," or fails to format, standard Windows tools often fail. Specialized tools like ufdisk interact directly with the chip’s firmware to:
In some cases, this may be sufficient to resurrect the drive [4†L31-L32].
to repack the tool
: Look for “Alcor AU87101A mass production tool” or “AlcorMP AU87101A repack”. Focus on resources like USBDev.ru , MyDigit.cn , or Elektroda.pl [15†L8-L9]. Ensure the tool explicitly supports the AU87101A controller. A mismatched tool can permanently damage the drive. Comprehensive Guide to AU87101A and Alcor Micro UFDisk
P: Vendor=058f ProdID=1234 Rev=00.02 S: Manufacturer=ALCOR S: Product=AU87101A UFDISK S: SerialNumber=123456789ABCDEF ... Controller: Alcor AU8710x? / AU89102DF? (see notes)
Once you have verified the hardware signature, follow this precise sequence to reprogram the controller. Step 1: Environmental Preparation
Here is a review and breakdown of the AU87101A UFDisk Repack tool and the controller itself.
I will cite the sources used, such as the askubuntu.com page showing the device details, the Lenovo support page for the driver, the Polish forum for the AlcorMP information, the Superuser page for the low-level format instructions, and the chipgenius detection data. If after trying multiple repacks and mass production
: Features built-in BCH ECC engines (up to 72bit/1K) to ensure data accuracy by correcting high error bits in the NAND flash.
Download a specialized hardware diagnostic tool like or Flash Drive Information Extractor (Anvil's) .
: After zero-filling, try creating a filesystem:
Increase the software ECC runtime threshold or manually reduce the targeted storage capacity. Mismatched firmware binary files payload.
Official UFDUtility versions are tied to specific drive vendors (e.g., Kingston, PNY, ADATA) and may refuse to work with “generic” drives. The repack is created by third-party enthusiasts to: