Always plug the USB into a motherboard port (back of the PC), not a front panel or a USB hub, to ensure stable voltage. 🔄 Step-by-Step Recovery Process 1. Identify the NAND Flash ID ChipGenius . Look for the "Controller" and "Flash ID" strings. AU87101A - [Flash ID: ADDE94D2] This ID determines which ALCOR MP (Mass Production) tool version you need. 2. Download the Correct AlcorMP Tool
Alcor Micro AU87101A (or AU87100 series) USB 3.0 controller chip
In many failure cases, you will see an output line similar to this:
If data backed up or not needed: Windows — quick reformat: au87101a ufdisk full
The controller's internal lookup table for memory blocks has become desynchronized. Write Protection Bit:
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.
This guide outlines how to flash and restore an Alcor-driven storage device back to its factory-working condition. 1. Why "AU87101A UFDISK" Errors Happen Always plug the USB into a motherboard port
Plug the drive directly into the motherboard ports on the back of your PC rather than front-panel hubs.
file delete cf1:/tmp/*.tmp file delete cf1:/tmp/*.log
file cf1: list recursive size sort
The logical division of the drive is broken, leading Windows or macOS to misread the capacity. Ask Ubuntu 💻 Recommended Fixes 1. Clear Read-Only Attributes (Windows) Often, the drive isn't full, but simply "locked." Command Prompt as Administrator. and press Enter. to find your USB's number. select disk X (replace X with your USB's number). attributes disk clear readonly 2. Low-Level Formatting
There is no specific standard software error message that reads "ufdisk full" as a line of text. However, users often search for this phrase when the utility UFDISK reports an issue. In practice, this generally corresponds to one of three physical states:
. When an Alcor-based drive experiences sudden firmware crashes, write-protection loops, or reports "0 bytes / No Media," standard operating system tools cannot fix the underlying hardware abstraction layer. Look for the "Controller" and "Flash ID" strings
| Partition | Mount Point | Purpose | Typical Size | |-----------|-------------|---------|---------------| | cf1: | / | Primary boot image, active config, logs | ~1 GB | | cf2: | /standby | Secondary image, backup config | ~1 GB | | cf3: | /logs | Syslog, audit logs, debug outputs | ~2 GB | | cf4: | /pcap | Packet capture storage | Variable (rest) |
