I have the RAR 4.X command line binary from RARLab. I found it is very inefficiency because it doesn't run multi-theading even I have 12 cores CPU available. It just takes one core to work with only. Since I have a lot of 50GB Blu-ray ISO files to be split apart and compressed into 1GB segment files.
Anybody know any RAR creation suite can support multi-theading to draw the advantage of multi-CPU core system?

Anybody know any RAR creation suite can support multi-theading to draw the advantage of multi-CPU core system?