// ntddcdrm.h

typedef struct _CDROM_PERFORMANCE_REQUEST {
  CDROM_PERFORMANCE_REQUEST_TYPE   RequestType;
  CDROM_PERFORMANCE_TYPE           PerformanceType;
  CDROM_PERFORMANCE_EXCEPTION_TYPE Exceptions;
  CDROM_PERFORMANCE_TOLERANCE_TYPE Tolerance;
  ULONG                            StaringLba;
} CDROM_PERFORMANCE_REQUEST, *PCDROM_PERFORMANCE_REQUEST;
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Windows Driver Kit DDI reference (ns-ntddcdrm-_cdrom_performance_request)

CDROM_PERFORMANCE_REQUEST structure

Description

The CDROM_PERFORMANCE_REQUEST structure is used as an input parameter to the IOCTL_CDROM_GET_PERFORMANCE I/O control request and describes the performance data requested.

Members

`RequestType`

The CDROM_PERFORMANCE_REQUEST_TYPE enumeration specifies the request type, CdromPerformanceRequest, or CdromWriteSpeedRequest.

`PerformanceType`

The CDROM_PERFORMANCE_TYPE enumeration specifies the type of performance data.

`Exceptions`

The CDROM_PERFORMANCE_EXCEPTION_TYPE enumeration specifies the type of exception.

`Tolerance`

The CDROM_PERFORMANCE_TOLERANCE_TYPE enumeration specifies the performance tolerance for the nominal performance and the time tolerance (seek delay) for the exception list.

`StaringLba`

The starting logical block address field.

CDROM_PERFORMANCE_REQUEST - NtDoc