Those 7900 drives were early '80s, while SPARC was late '80s ... amazing how much shrinkage storage experienced in those few years, no?
I wonder how far behind we'd be if today's elfin safety nazis had come into existence in that decade. Probably still stuck with the VLB bus and half height 5.25 drives ... with silicon being built on 6" (`150mm to you euro-types) cookies.