[ubuntu] Mounting blank CD error

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http://ubuntuforums.org – Sometimes, if I enter a blank CD (80 min, 700 MB) into my drive for burning, it'd either: 1) Freeze every 20 minutes or so. 2) Read it but not burn. 3) Do nothing, It'd been a pain in the butt, and I really want to burn an ISO someone gave me. Help, pl0x? (Hardware)