IOCTL_STORAGE_SET_READ_AHEAD control code
Causes the device to skip to the given target address when the device reaches a certain trigger address during read-ahead caching.
The buffer at Irp->AssociatedIrp.SystemBuffer contains a STORAGE_SET_READ_AHEAD structure that indicates the trigger and target addresses.
The Information field is set to zero. The Status field is set to STATUS_SUCCESS.