Foreword by Charles Fan

Earlier this year, I had the pleasure of sitting in a session by Clayton Christensen. His seminal work, Innovator’s Dilemma, was one of my favorite business readings, and it was an awesome experience to hear Clayton in person. For the whole session, I had this surreal feeling that there were no other people in the room, just Clayton and me, and we were discussing Virtual SAN (VSAN).

The topic of the discussion? Is VSAN a disruptive innovation or a sustaining innovation?

As they were defined in Clayton’s book, sustaining innovations are the technological advances that make things better, faster, more powerful to answer to the increasing demand from customers. Sustaining innovations do not require any change in the business ...

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