I just analyzed this all over again in bug 446897 (now a duplicate). This has a very easy test case:
$ mkdir /tmp/x; cd /tmp/x $ touch foo bar $ mkisofs -o ../test.iso -v -J -V "Name" * $ blkid -p ../test.iso ../test.iso: LABEL="Name " VERSION="Joliet Extension" TYPE="iso9660" USAGE="filesystem"
I just analyzed this all over again in bug 446897 (now a duplicate). This has a very easy test case:
$ mkdir /tmp/x; cd /tmp/x
$ touch foo bar
$ mkisofs -o ../test.iso -v -J -V "Name" *
$ blkid -p ../test.iso
../test.iso: LABEL="Name " VERSION="Joliet Extension" TYPE="iso9660" USAGE="filesystem"