IOCTL_CDROM_SET_SPEED IOCTL (ntddcdrm.h)

Sets the spindle speed of the CD-ROM drive.

Major code

IRP_MJ_DEVICE_CONTROL

Input buffer

The buffer at Irp->AssociatedIrp.SystemBuffer contains either a CDROM_SET_SPEED structure or a CDROM_SET_STREAMING structure. These two structures have the same first member: an CDROM_SPEED_REQUEST enumeration value. Caller uses this enumeration value to specify which of these two structures is in the input buffer.

Input buffer length

Parameters.DeviceIoControl.InputBufferLength in the I/O stack location indicates the size, in bytes, of the buffer.

Output buffer

None.

Output buffer length

None.

Status block

The Information field is set to zero. The Status field is set to STATUS_SUCCESS, if the operation succeeds, to STATUS_INFO_LENGTH_MISMATCH (ERROR_BAD_LENGTH) if the input buffer was too small, to STATUS_INVALID_DEVICE_REQUEST (ERROR_INVALID_FUNCTION), if the device does not support the request, or the device is not a Mount Ranier reWriteable (MRW)-compliant device, and to STATUS_INVALID_PARAMETER (ERROR_INVALID_PARAMETER, if the indicated request type is invalid.

Remarks

For an explanation of function and purpose of this request, see CD-ROM Set Speed.

Requirements