I've just finished coding a new balancing plugin for StableBit DrivePool, it's called the SSD Optimizer. This was actually a feature request, so here you go.   I know that a lot of people use the Archive Optimizer plugin with SSD drives and I would like this plugin to replace the Archive Optimizer for that kind of balancing scenario.   The idea behind the SSD Optimizer (as it was with the Archive Optimizer) is that if you have one or more SSDs in your pool, they can serve as "landing zones"