Enable "Preformat (Low Level Format)" within MPALL config and specify a slightly lower target capacity. Mismatched or outdated firmware binary version.
: USB 3.0 SuperSpeed backward compatible with USB 2.0. Architecture : 32-bit RISC processor.
: The primary mass production tool used to manage the flashing sequence (e.g., versions MPALL v3.70.0E or v3.72.0B ). Phison Ps2251-07-ps2307-
This tool is an excellent choice if your drive is recognized by Windows but is write-protected, has the wrong capacity, or is otherwise behaving erratically. The process is straightforward:
If the simple restore tool does not work, the next step is to use the "mass production" tools that Phison provides to USB manufacturers. These are the same tools used to format and initialize the drive at the factory. The two primary tools for the PS2251-07 are and UPTool . Enable "Preformat (Low Level Format)" within MPALL config
is one of the most widely deployed, ultra-high-speed USB 3.0-to-Flash microcontroller chips in the consumer electronics market. Developed by Phison Electronics , a global leader in NAND flash controllers, this specific chip acts as the "brain" for millions of USB flash drives produced by major brands like Kingston, Toshiba, and Silicon Power.
| Issue | Likely fix | |--------|-------------| | Drive not detected | Short two adjacent data pins (test mode) | | MPALL says “Not support flash” | Wrong tool version – try v3.72 or v5.13 | | Stuck at “ISP Checking” | Incompatible FW – extract original FW with GetInfo | | After flash: 8MB capacity | Didn’t erase all first – retry with EraseAllFirst=1 | Architecture : 32-bit RISC processor
: A permanent, read-only bootloader burned into the silicon during manufacturing.
Users often encounter specific technical failures with this controller that render the drive unusable without low-level intervention.
Complete Guide to the Phison PS2251-07 (PS2307) USB Controller
: A simpler, consumer-facing tool that can sometimes fix write-protection issues on these controllers without needing full firmware re-flashing. Firmware and Data Recovery Phison PS225107 USB Drive. - HDD GURU FORUMS