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Channel: Why can't we write over a CD/DVD after it's been burned/finalized? - Super User
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Answer by bot47 for Why can't we write over a CD/DVD after it's been burned/finalized?

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This actually exists and is called smart erase. It is Lite-On proprietary and I have never seen anyone use this.

With SmartErase users can erase the data on DVD±R (DL) and CD-R discs that contain confidential data and which should not be retrievable in any way. The feature works by overwriting the original data on the disc with random meaningless characters so that the original data can no longer be read by any drive.

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