 Before this technology, a user would have to wait for the formatting to complete before writing any data to a new disc.It is even possible to read (but not write) MRW disks without an MRW-compatible drive; A "remapper" device driver is needed, an example of which is EasyWrite Reader for Windows.An alternative to MRW is to physically format a disc in UDF 1.5 or higher using the spared build.