[ubuntu] 2 extra CD/DVD drives appear by magic

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http://ubuntuforums.org – I booted up my laptop today after the battery ran dry while I was out of the room. Every thing worked as normal, but when I went into Places-Computer, there was 2 more CD/DVD drives than when I left. Right next to my real one! I looked in /media and they were there too, listed as cdrom and cdrom0, but they both open into my Cd drive. i tried unmounting them through the terminal but it says there's nothing there, and I looked in fstab and only the actual drives and partitions on my computer were there. how do i get rid of them? (Hardware)