Most CD and DVD discs that have longevity problems seem to have had serious quality problems from day one. Jerry > -----Original Message----- > From: Association for Recorded Sound Discussion List > [mailto:[log in to unmask]] On Behalf Of phillip holmes > Sent: Sunday, July 02, 2006 5:32 PM > To: [log in to unmask] > Subject: Re: [ARSCLIST] Longevity > > NO, but how many 78s go bad just sitting there? > ----- Original Message ----- > From: "Jerome Hartke" <[log in to unmask]> > To: <[log in to unmask]> > Sent: Sunday, July 02, 2006 3:55 PM > Subject: Re: [ARSCLIST] Longevity > > > > CD and DVD error detection and correction algorithms will "play" discs > > with > > 2 mm diameter holes. Some DVD systems require a 6 mm defect before data > > loss > > occurs, and the problem is then loss of servo lock by the read drive. > Can > > 78s do this? > > > > Jerry > > Media Sciences, Inc.