Hello, When running the "gui-installed-desktop-os-encrypted" test which produces a big ISO9660 image (~4GiB), the following error occurs: --8<---------------cut here---------------start------------->8--- xorriso : UPDATE : 434919 files added in 18 seconds libisofs: FAILURE : HFS+ map nodes aren't implemented libisofs: FAILURE : Too much files to mangle, cannot guarantee unique file names --8<---------------cut here---------------end--------------->8--- I asked Thomas Schmitt (of GNU Xorriso) about it. It seems that producing an HFS+ tree could fail if a directory contains more than 30720 files. HFS+ seems to be used to work-around filesystem limits that we don't have on Intel architectures (see Thomas kind answer below). Here's a patch that disables HFS+ tree production, and the solves the problem above. Thanks, Mathieu