DISK_GEOMETRY

The DISK_GEOMETRY structure describes the geometry of disk devices and media.

typedef struct _DISK_GEOMETRY { 
  LARGE_INTEGER  Cylinders; 
  MEDIA_TYPE  MediaType; 
  DWORD  TracksPerCylinder; 
  DWORD  SectorsPerTrack; 
  DWORD  BytesPerSector; 
} DISK_GEOMETRY; 

Members

Cylinders

The number of cylinders.

MediaType

The type of media. See MEDIA_TYPE.

TracksPerCylinder

The number of tracks per cylinder.

SectorsPerTrack

The number of sectors per track.

BytesPerSector

The number of bytes per sector.

Remarks

The DeviceIoControl function receives a DISK_GEOMETRY structure in response to an IOCTL_DISK_GET_DRIVE_GEOMETRY control code. The DeviceIoControl function receives an array of DISK_GEOMETRY structures in response to an IOCTL_DISK_GET_MEDIA_TYPES control code.

Requirements

  Windows NT/2000: Requires Windows NT 3.1 or later.
  Windows 95/98: Unsupported.
  Header: Declared in Winioctl.h.

See Also

Device Input and Output Overview, Device Input and Output Structures, DeviceIoControl, IOCTL_DISK_GET_DRIVE_GEOMETRY, IOCTL_DISK_GET_MEDIA_TYPES, MEDIA_TYPE