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If you’ve ever plugged in your USB drive only to be greeted by a "No Media" error or a "Write Protected" message that refuses to budge, you've likely encountered a firmware "panic". For drives powered by the (also known as PS2307 ) controller, there is a specialized "resurrection" path: the Mass Production Tool (MPTool), specifically Phison MPALL .
For the PS2251-07 series, the most common and recommended version is , often bundled with the specific binaries for this chipset. Other iterations, such as UPtool or STTool, exist, but MPALL is generally the most user-friendly for this specific controller.
The old Phison MPALL tools are notoriously finicky with modern Operating Systems. While Windows 10 or 11 can work, stability is best achieved on Windows 7 or Windows XP . If you only have Windows 10, you may need to run the tool in Windows 7 Compatibility Mode or disable Driver Signature Enforcement. Crucially, the tool often fails on USB 3.0 ports. For best results, plug your drive into a USB 2.0 port directly on the motherboard (not the front panel of the PC case).
This is the safest way to fix a 0-byte drive without dealing with complex flash IDs.
Close the configuration assistant and launch as an Administrator.
Inside the settings panel, check the option for Preformat (low level format) . If the drive keeps erroring out, set the Target Capacity to slightly lower than its true maximum (e.g., set a 16GB drive to 14500) to safely bypass dead cells. Begin flashing: Click the Start button.
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If you’ve ever plugged in your USB drive only to be greeted by a "No Media" error or a "Write Protected" message that refuses to budge, you've likely encountered a firmware "panic". For drives powered by the (also known as PS2307 ) controller, there is a specialized "resurrection" path: the Mass Production Tool (MPTool), specifically Phison MPALL .
For the PS2251-07 series, the most common and recommended version is , often bundled with the specific binaries for this chipset. Other iterations, such as UPtool or STTool, exist, but MPALL is generally the most user-friendly for this specific controller.
The old Phison MPALL tools are notoriously finicky with modern Operating Systems. While Windows 10 or 11 can work, stability is best achieved on Windows 7 or Windows XP . If you only have Windows 10, you may need to run the tool in Windows 7 Compatibility Mode or disable Driver Signature Enforcement. Crucially, the tool often fails on USB 3.0 ports. For best results, plug your drive into a USB 2.0 port directly on the motherboard (not the front panel of the PC case).
This is the safest way to fix a 0-byte drive without dealing with complex flash IDs.
Close the configuration assistant and launch as an Administrator.
Inside the settings panel, check the option for Preformat (low level format) . If the drive keeps erroring out, set the Target Capacity to slightly lower than its true maximum (e.g., set a 16GB drive to 14500) to safely bypass dead cells. Begin flashing: Click the Start button.
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