Thanks for clarification.

Fusion IOdrives are part of the legacy and IIRC you cant boot from them in general because of the very complicated and special driver. Have nothing to do with the VRTX in general.

Regards,
Joerg

Thanks for the clarification, is there any possibility of merging the physical 4server into a single powerful virtual machine?, So combine all the performance of 4 server in 1?

No. Depending on the workload (application) horizontal scaling is better than vertical. Standard x86 hardware doesnt work that way.

I use all my VRTX as a VMware vSphere Cluster.

Regards,
Joerg

PS: In a former life i work with SGI Origin server which work in way you would like to see with your VRTX. Having a single image system which bind dozens of computing hardware together.