Mini-filters are FS level as are VFS solutions. How do you tell a thing that sits at the VFS level about multiple devices? You could probably do it, nothing sto

Mini-filters are FS level as are VFS solutions. How do you tell a thing that sits at the VFS level about multiple devices? You could probably do it, nothing storage engineers solve is unsolvable :) It certainly seems unnatural. Most of those appliance solutions (and probably Fusion Drive for that matter) implement their mojo at the block level and provide block device interfaces. This is to aid their seamlessness, it makes them a lot more straightforward to implement and it makes them a lot more flexible. I would have trouble believing it would be simpler to implement it at a mini-filter/VFS level.