shelf life of data on DVD-R and DVD-RW

Has anyone experimentally found that DVD-R last
longer than DVD-RW? Since -R absorbs the dye it
should last longer than RW which change crystalline state.

On Sat, 29 Dec 2007 15:39:34 -0500, Rick Merrill
<rick0.merrill@NOSPAM.gmail.com> wrote as underneath my scribble :


Yes I tried sidebyside tests by distress in sunlight which is accelerated
exposure to UV and heat, DVD-R are much tougher under this duress than either
DVD+R or DVD+RW (on the makes I tried).
Also 16X speed DVD-R disks showed weakness. As result - I use only DVD-R 8X
speed which seems the best compromise with cool and dark storage...!
For longevity of important data disks I record 8X disks at 4X which is the write
strategy design speed.
Charlie+

>Has anyone experimentally found that DVD-R last
>longer than DVD-RW? Since -R absorbs the dye it
>should last longer than RW which change crystalline state.

Charlie+ <charlie@xxx.net> wrote:
>
>For longevity of important data disks I record 8X disks at 4X which is the write
>strategy design speed.

That 4x write strategy is provided in case when the burners do not
have the media in their media table. 4x is NOT necessarily the
*optimum* burn speed for the media/burner combination.

If your burner has the 8x media in its media table, it's best to burn
at whatever the speed the burn software lists by default.

Rick Merrill <rick0.merrill@NOSPAM.gmail.com> wrote:
>
>Has anyone experimentally found that DVD-R last
>longer than DVD-RW? Since -R absorbs the dye it
>should last longer than RW which change crystalline state.

The shelf life is how long a R/RW disc retain writability. For both
CD/DVD, manufacturers say 5-10 years.

The archival life, how long a burned data is retained, claimed by
manufacturers for both CD/DVD is 50 years for RW media and 100 years
for R media.

If you search for "cd rot", you will get many horror stories.