This in-depth article has some recommendations for which media to use for archival purposes. It explains why DVD+R is superior to DVD-R for data, and prefers Taiyo Yuden as only media worth buying.
As I said earlier, DVD-R sucks for data preservation for three reasons: inferior error correction, inferior ‘wobble’ tracking, and the fact its data writing methods look like an un-needed halfway point between CD-R and DVD+R. The wobble tracking I shall explain first, then the error corrections method, then the specifics of ATIP/pre-pit/ADIP optimum power settings.
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