[Jeff Leland] “if I set the preferences to leave media in place, and consolidate that media into the library, I use NO additional disc space – even though I see two additional folders created that seem to copy the original media as well as optimized media into the original media folder – correct?”
Hard links will NOT be used when *importing* media on the same volume within a library or to an external location managed by that library. This is even for cases where no re-wrapping takes place. Additional space will be consumed.
Hard links are only used when FCPX is copying media from one managed location to another on the same volume. E.g, copying media within FCPX from one managed “internal” library to another, or from a managed “internal” library to a library with external media defined in Library Properties>Storage Locations, or between two libraries using external media defined in Library Properties. Note that a library using external media is different from a library where media was imported with “leave files in place”.
This can be verified by using the console commands ls -i (to see file’s inode) and ls -l ( to see files’s reference count). If the inode is the same, it’s actually a single file with multiple hard links pointing to it which gives the appearance at the Finder level of multiple copies of that file. Likewise ls -l will show the reference count, which increments once for each hard linked “copy” of the file.
The file’s reference count will increment if copying data within FCPX between managed libraries (showing it’s really the same file using multiple hard links). Even though Finder shows two different media files in that case, there is only one physical file and no more space is consumed. Also ls-i will show the two files having the same inode.
The reference count will not increment when importing media, showing it’s two physical files, each taking up space. The two files have different inodes.
So the idea is incorrect that hard links will avoid additional space consumption if importing media on the same drive volume.