To destroy data stored on "write once read many" (WORM) media, the media must be physically destroyed. WORM media is designed to prevent data from being modified or erased once written. Therefore, the only effective method to ensure that the data is irretrievable is to physically destroy the media.
[Reference:, IAPP CIPT Study Guide: Data destruction methods for various storage media., NIST SP 800-88: Guidelines for Media Sanitization, which recommends physical destruction for WORM media., , , , ]
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