// ntddcdrm.h

// CTL_CODE(0x0002, 0x013, METHOD_BUFFERED, FILE_READ_ACCESS)
#define IOCTL_CDROM_GET_DRIVE_GEOMETRY 0x0002404C
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Windows Driver Kit DDI reference (ni-ntddcdrm-ioctl_cdrom_get_drive_geometry)

IOCTL_CDROM_GET_DRIVE_GEOMETRY IOCTL

Description

Returns information about the CD-ROM's geometry (media type, number of cylinders, tracks per cylinder, sectors per track, and bytes per sector).

Parameters

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).

Input/output buffer

Input/output buffer length

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.

IOCTL_CDROM_GET_DRIVE_GEOMETRY - NtDoc