From everything I&#x27;ve heard, RK07s were ... subpar.  I&#x27;m not surprised one failed like that.  RL02s were meh, but they worked, the first system I was responsible for had 1 or 2 of them.<p>I asked because the RA81 which was released in 1982 was, in MIT&#x27;s Project Athena experience, awful, they had some sort of problem with glue, and they were losing 1 a week out of a population of no more than 40 drives (!).  But it sounds like they were more careful, more lucky, whatever with the earlier RM80s, which I don&#x27;t remember hearing anything bad about.