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I need to programmatically determine out how many sectors, heads, and cylinders are on a physical disk from Windows XP. Does anyone know the API for determining this? Where might Windows expose this information?
Use DeviceIoControl with control code IOCTL_DISK_GET_DRIVE_GEOMETRY or IOCTL_DISK_GET_DRIVE_GEOMETRY_EX.
There’s sample code in MSDN to do this here.