how to redirect C:\XXXX to Z:\yyyyy

NTFSD
1

I’m writing a file system filter driver to redirect a path to anoter path.An
example:
c:\xxxx\yyyy -------> z:\dddd\aaaa

I know to change the FileObject->FileName to change the filename,and set
Irp->IoStatus.Information = IO_REPARSE;
Irp->IoStatus.Status = STATUS_REPARSE;

IoCompleteRequest(Irp, IO_NO_INCREMENT);

return STATUS_REPARSE;
but the filename is such as \xxxx\yyyy,not C:\xxxx\yyyy,how to change the
C:\ to Z:\