IOCTL_CDROM_RAW_READ IOCTL (ntddcdrm.h)

Reads data from the CD-ROM in raw mode.

Major code

IRP_MJ_DEVICE_CONTROL

Input buffer

If the IOCTL is from user mode, Irp->AssociatedIrp.SystemBuffer contains a RAW_READ_INFO structure that specifies the starting disk offset, the sector count, and the track mode (XA or CDDA) for the read. Parameters.DeviceIoControl.InputBufferLength specifies the size, in bytes, of the structure, which must be >= sizeof(RAW_READ_INFO). Parameters.DeviceIoControl.OutputBufferLength specifies the size of the buffer to be read, which must be >= sizeof(SectorCount * RAW_SECTOR_SIZE).

If the IOCTL is from kernel mode, Parameters.DeviceIoControl.Type3InputBuffer contains a structure that specifies the starting disk offset, the sector count, and the track mode (XA or CDDA) for the read. Parameters.DeviceIoControl.OutputBufferLength specifies the size of the buffer, in bytes, to be read, which must be >= sizeof(SectorCount * RAW_SECTOR_SIZE).

Input buffer length

See above.

Output buffer

The driver writes the requested bytes directly (using DMA or PIO) to the buffer described by the MDL at Irp->MdlAddress.

Output buffer length

Length of an MDL.

Status block

If the read is successful, the driver sets Status to STATUS_SUCCESS and Information to the number of bytes transferred. If the read is not successful, the driver sets Information to zero and Status to possibly STATUS_INVALID_PARAMETER, STATUS_INSUFFICIENT_RESOURCES, or STATUS_INVALID_DEVICE_REQUEST.

Requirements

See also

RAW_READ_INFO