- Switched to whole new IOP core
- Changed some compatibility modes effect
- Added compatibility for DVD9 layer1
- Improved overall speed for both SMB/USB
- Support for more embedded NAS devices
- Support for multiple partitions
If I had to guess, I'd say he's referring to PS2 DVD9 titles (List HERE) versus running them off disc... it's been so long since I've been into PS2 stuff but there may have been a "DVD9" option in the old HDA/HDL apps and perhaps support for that is now included.