It started out as a separate drive for home directories and files that didn't fit on the first drive. cf. /usr/dmr (Dennis Ritchie), and /usr/ken (Ken Thompson)

It started out as a separate drive for home directories and files that didn't fit on the first drive. cf. /usr/dmr (Dennis Ritchie), and /usr/ken (Ken Thompson). https://blog.w1r3.net/2018/01/06/rob-landley-about-usr-split.html https://blog.w1r3.net/2018/01/06/rob-landley-about-usr-split...