typedef struct _CM_INT13_DRIVE_PARAMETER { USHORT DriveSelect; ULONG MaxCylinders; USHORT SectorsPerTrack; USHORT MaxHeads; USHORT NumberDrives; } CM_INT13_DRIVE_PARAMETER, *PCM_INT13_DRIVE_PARAMETER;
CM_INT13_DRIVE_PARAMETER defines a device-type-specific data record that is stored in the \\Registry\Machine\Hardware\Description tree for a disk controller if the system can collect this information during the boot process.