Cfadisk Inf
The cfadisk driver modifies the device hardware ID information sent to Windows, forcing the OS to treat the device as a "Basic Disk" or Fixed Disk. This allows you to partition the drive just like an internal HDD or SSD.
While modern versions of Windows (Windows 10 version 1703 and later) have largely solved the problem of multi-partitioning on USB drives, the cfadisk.inf method remains a vital tool for older systems or specific legacy hardware configurations. What is Cfadisk.inf? Cfadisk Inf
file in Notepad. It looked like a poem written in low-level logic—a list of hardware IDs and registry instructions. The cfadisk driver modifies the device hardware ID
[Version] Signature="$Windows NT$" Class=DiskDrive ClassGuid=4d36e967-e325-11ce-bfc1-08002be10318 Provider=%HGST% DriverVer=12/14/2002,1.0.0.1 [Manufacturer] %HGST%=cfadisk_device [cfadisk_device] ; This is the line you must edit with your device's ID %Microdrive_devdesc% = cfadisk_install,USBSTOR\Disk&Ven_LEXAR&Prod_JD_LIGHTNING&Rev_1100 [cfadisk_install] CopyFiles=cfadisk_copyfiles [cfadisk_copyfiles] cfadisk.sys,,,2 [cfadisk_install.Services] AddService=cfadisk,2,cfadisk_ServiceInstallSection [cfadisk_ServiceInstallSection] DisplayName="Hitachi Microdrive Filter Driver" ServiceType=1 StartType=3 ErrorControl=1 ServiceBinary=%12%\cfadisk.sys LoadOrderGroup=PnP Filter [Strings] HGST="Hitachi Global Storage Technologies" Microdrive_devdesc="Hitachi Microdrive" Use code with caution. Copied to clipboard How to Customise Your File What is Cfadisk
You then manually "Update Driver" in Device Manager, choosing "Browse my computer" and "Let me pick from a list." By forcing Windows to use the modified Cfadisk.inf , the device will reconnect as a Fixed Disk. Risks and Modern Alternatives Using Cfadisk.inf comes with a few caveats:
