So no high availability, huh?
Too bad - makes it a non starter for the vast majority of users who would pay for it.
Hmm, not sure what you mean by "high availability" in this context. RAID protection?
This is not built-in, but it can sit on top of (software or hardware) RAID volumes, so I don't see an issue here.
I mean multiple controllers. E.g, the whole thing is one giant single point of failure.
you completely missed the point that we are talking about software here, not hardware. A solution based on this software will be as available as the hardware that runs it. And if the hardware is a VM e.g. availabilty can be quite good.
HA seems to be supported (or was probably available sometime after this thread was created). I have to try it out. The requirement for HA seems to be that both nodes are connected to a shared storage.
However dedupe works great for ESXi datastores.
Wanted to add that quadstor is now fully open sourced. Good news !