Re: DVD Durability

Pierre J. Gregoire (pgregoire@dupage.k12.il.us)
Thu, 11 Feb 1999 09:31:09 -0800 (PST)

DVD's have two layers (and may use both sides), with variable data rates, higher
compression, shorter "pit length" (where the data goes) and are more like a soft
gold tip on a Waterman pen; a beautiful instrument, but don't let your patrons use
it to press the restart button on their PC.
We have begun circulation to our schools, (both DVD-ROM & Video) but have not
noticed any degradation yet.
see http://www.sel.sony.com/SEL/consumer/dvd/about_specs.html
for specs.
--
Pierre Gregoire
Director
Audio Visual Institute of DuPage
A Collective Media Library
for the Students & Teachers of
DuPage County, Illinois
630-495-2843  FAX: 630-495-5175

Judy Jones wrote:

> Apropos DVD technology and durability, could someone explain to > me the major differences between the construction of CDs (which > seem to be very tolerant of heavy handling) and DVDs. Thanks in > advance. judyjones@csus.edu > > Date: Thu, 11 Feb 1999 08:27:57 > -0800 (PST) Reply-to: videolib@library.berkeley.edu From: > "Karen C. Driessen" <karend@selway.umt.edu> To: Multiple > recipients of list <videolib@library.berkeley.edu> Subject: Re: > DVD Durability > > You may want to collect anectdotal info from your local video stores who > circulate these. We haven't jumped in yet but I hear the local stores are > experiencing many durability problems and complaints from customers. > > At 10:32 AM 2/10/99 -0800, you wrote: > >This is reallllly off the top of the head, and with little but anecdotal > >evidence, Kris, but we've found that DVD's seem for some reason to be more > >susceptible to errors due to dirt and grim than laser. Don't know if this > >is just a quirk...if it's due to a more finely tuned read mechanism in DVD, > >or differences in the physical medium. > > > >Gary Handman > >UCB > > > > > >>We haven't collected DVDs long enough to have any data on durability yet. > >>There are anecdotes suggesting that DVDs are easily damaged. Have any of > >>your libraries experienced problems with DVD durability? I'm hoping some > >>of you have had DVDs in circulation long enough to have anecdotal > >>information of your own! Thanks. > >> > >>Kristine Brancolini > >>Indiana University Libraries > > > > > >Gary Handman > >Director > >Media Resources Center > >Moffitt Library > >UC Berkeley, CA 94720-6000 > >510-643-8566 > >ghandman@library.berkeley.edu > >http://www.lib.berkeley.edu/MRC > > > >"You are looking into the mind of home video. It is innocent, it is aimless, > >it is determined, it is real" --Don DeLillo, Underworld > > > > > Karen C. Driessen, Director Phone: 406-243-2856 > Instructional Media Services FAX: 406-243-4067 > Mansfield Library E-mail: > karend@selway.umt.edu > The University of Montana > Missoula MT 59812