[9fans] Writing a CD image

[lucio]

What does the following mean?

        nwa is 262298 but invis track starts blk 0
        cdfs: nwa from drive 0 != computed nwa 262,146
                be careful!  assuming computed nwa

Previously using a disk that came up with this error led to what
looked like corrupted data (I was able to ignore that, so I'm not
entirely sure),

Lucio.