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This is a quick breakdown of the various extensions you might find when purchasing CDs or DVDs.
-R
| Can only be written to once
| -RW
| Can be erased and reused multiple times.
| | +RW | Can be erased and reused mulitple times.
| +ROM
| Can only be read.
| DVD+R DL
| Dual-layer discs for writing data once.
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DVD+Rs and DVD=Rs use different formats much like the two formats that were once available for video tapes: VHS (Victor Home System) or Betamax (Sony).
DVD-Rs are more compatible than DVD+Rs because they were first on the scene. The DVD+Rs have a little bit of a technical edge but are newer and therefore, not always compatible with older machines. Read what your machine can burn in its Apple System Profiler (http://docs.info.apple.com/article.html?artnum=153426) before purchasing any DVDs. Most of the time, the DVD-Rs will be compatible.
Apple has more information on DVD technology: http://docs.info.apple.com/article.html?artnum=24451 Some CD/DVD-RW discs may be incompatible with older computers and audio players. Always check the system you intend to play the CD/DVD on before burning any data. |  |
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