http://berklix.com/~jhs/src/bsd/fixes/FreeBSD/src/gen/usr.bin/tar/log.ignore

Media errors on DVD were detected by FreeBSD dvd driver,
but were wrongly Ignored by /usr/src/usr.bin/tar/write.c : Bug !

I hacked code in /usr/src/usr.bin/tar/
 diff -c util.c ../tar/util.c >> ~/public_html/src/bsd/fixes/FreeBSD/src/gen/usr.bin/tar/util.c.diff.REL=ALL.diff
 diff -c write.c ../tar/write.c >> ~/public_html/src/bsd/fixes/FreeBSD/src/gen/usr.bin/tar/write.c.REL=ALL.diff