CDROM_SET_SPEED structure (ntddcdrm.h)
The CDROM_SET_SPEED structure is used with the IOCTL_CDROM_SET_SPEED request to set the spindle speed of a CD-ROM drive during data transfers in which no data loss is permitted.
Syntax
typedef struct _CDROM_SET_SPEED {
CDROM_SPEED_REQUEST RequestType;
USHORT ReadSpeed;
USHORT WriteSpeed;
WRITE_ROTATION RotationControl;
} CDROM_SET_SPEED, *PCDROM_SET_SPEED;
Members
RequestType
A CDROM_SPEED_REQUEST-typed value that indicates the type of set speed operation for IOCTL_CDROM_SET_SPEED to perform.
ReadSpeed
The read speed, in kilobytes per second.
WriteSpeed
The write speed, in kilobytes per second.
RotationControl
A WRITE_ROTATION-typed value that indicates whether the drive uses constant angular velocity (CAV) or constant linear velocity (CLV) rotation when it writes to a CD.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddcdrm.h (include Ntddcdrm.h) |