Some CDs don't mount reliably

We make distribution CDs of documentation by burning iso files created
with the mkisofs command on solaris. A CD made this way with one set of
PDF files mounts fine every time on an Ultra 10. One with other PDFs
mounts unreliably at best. The PDFs themselves seem to be fine. And all
CDs mount fine on PC and OS9 Mac. How do I troubleshoot this?

Thx,
Ron
.

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