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DVD vs. DVD vs. CDROM Reference Chart

  Disc Can be written to by drives of type Disc Disc
Cost		 Cartridge Quick Data Defect Maximum Sequential Data or
  Type DVD-RW DVD+RW DVD-RW/+RW Capacity 2003   Format Verification Management Rewrites  or Random Video
Write Once DVD-R Yes No Yes 4.7GB $4 No N/A No No N/A Sequential Video
  DVD+R No Yes Yes 4.7GB $5 No N/A No No N/A Sequential Video
  CD-R Yes Yes Yes 700MB >$1 No N/A No No N/A Sequential Both
Rewriteable DVD-RW Yes No Yes 4.7GB $6 No Optional No No 1000 Sequential Data
  DVD+RW No Yes Yes 4.7GB $7 No Yes No Yes (1) 1000 Sequential Data
  DVD-RAM No No No 4.7GB (2) $15 Yes (3) N/A (4) Yes Yes 100000 Random Data
  CD-RW Yes Yes Yes 700MB $1 No No No No 1000 Sequential Data
 

(1) Only on Mt. Ranier writes, which are NOT supported by most drives.

(2) Double-sided discs hold 2x 4.7GB or 9.4GB.

(3) Also available without cartridge

(4) DVD-RAM discs are preformatted

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