IOCTL_STORAGE_DIAGNOSTIC IOCTL (ntddstor.h)
IOCTL_STORAGE_DIAGNOSTIC is used to query diagnostic data from the storage driver stack.
Major code
Input buffer
Irp->AssociatedIrp.SystemBuffer contains a STORAGE_DIAGNOSTIC_REQUEST structure that describes the diagnostic request being made about the storage driver stack.
Input buffer length
Parameters.DeviceIoControl.InputBufferLength indicates the size, in bytes, of the parameter buffer at Irp->AssociatedIrp.SystemBuffer, which must be >= sizeof(STORAGE_DIAGNOSTIC_REQUEST).
Output buffer
The driver returns output to the buffer at Irp->AssociatedIrp.SystemBuffer. This buffer contains a STORAGE_DIAGNOSTIC_DATA structure with diagnostic data about the storage driver stack.
Output buffer length
Parameters.DeviceIoControl.OutputBufferLength indicates the size, in bytes, of the parameter buffer at Irp->AssociatedIrp.SystemBuffer, which must be >= sizeof(STORAGE_DIAGNOSTIC_DATA).
Input / Output buffer
n/a
Input / Output buffer length
n/a
Status block
Irp->IoStatus.Status is set to STATUS_SUCCESS if the request is successful. Otherwise, Status is set to the appropriate error condition as a NTSTATUS code. For more information, see NTSTATUS Values.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddstor.h |