Kind of odd that the blog states that "The architect for ZFS at Apple had left" and links to the LinkedIn profile of someone who doesn't have any Apple work experience listed on their resume. I assume the author linked to the wrong profile?
This is the correct person: https://github.com/don-brady
Also can confirm Don is one of the kindest, nicest principal engineer level people I’ve worked with in my career. Always had time to mentor and assist.