ln -s creates 'fast' symbolic links. These break if you copy them (and their targets) to e.g. optical media. I believe old style 'slow' symbolic links would work, but how can I create them? There's no
ln flag or other command that I can find.
Some info for context, from the wikpedia page on symbolic links:
Early implementations of symbolic links stored the symbolic link information as data in regular files. The file contained the textual reference to the link's target, and the file mode bits indicated that the type of the file is a symbolic link.
This method was slow and an inefficient use of disk-space on small systems. An improvement, called fast symlinks, allowed storage of the target path within the data structures used for storing file information on disk (inodes). This space normally stores a list of disk block addresses allocated to a file. Thus, symlinks with short target paths are accessed quickly. Systems with fast symlinks often fall back to using the original method if the target path exceeds the available inode space. The original style is retroactively termed a slow symlink. It is also used for disk compatibility with other or older versions of operating systems.