Date   : Fri, 22 Jun 1984 03:28:00-EDT
From   : Jerry E. Pournelle <POURNE@Mit-Mc.ARPA>
Subject: Question from a Novice

The only difference between "single side" and "double side" is
quality control; premium disk houses test both sides and if they
get soft errors on one side either put the disk out as single
side or job lot it to somebody else to sell however they want to...