@me_ From what I recall, there was no commercially offered virtualisation at the time since the Sun-promoted way was to use hardware-based separation, e.g., used in the StarFire E10000 servers. They had a separate control node to reprogram the FPGA? hardware bus switch to create separated hardware domains on boot. The separation guarantees were stronger (i.e. no noisy neighbor problems since all compute, memory and IO was bound to a particular domain and not shared) but of course came with a very different price tag.