CD/DVD Drive can read DVDs, but not CDs.

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http://www.linuxquestions.org – The CD/DVD drive in a friend's Dell laptop can read data on, and boot, from a DVD disk, but cannot read, or boot, from a CD. Seems very odd, eh? Any ideas why this might happen? This problem exists in both Linux and winblows. Thanks. :hattip: (HowTos)