IOCTL_CDROM_GET_DRIVE_GEOMETRY IOCTL (ntddcdrm.h)
Returns information about the CD-ROM's geometry (media type, number of cylinders, tracks per cylinder, sectors per track, and bytes per sector).
Major code
Input buffer
None.
Input buffer length
None.
Output buffer
The driver returns the DISK_GEOMETRY-type information in the buffer at Irp->AssociatedIrp.SystemBuffer.
Output buffer length
Parameters.DeviceIoControl.OutputBufferLength in the I/O stack location of the IRP indicates the size, in bytes, of the buffer, which must be >= sizeof(DISK_GEOMETRY).
Status block
Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status to the appropriate error condition as a NTSTATUS code.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddcdrm.h (include Ntddcdrm.h) |