![]() Before we arrive at a conclusion, we would first need to understand the basics of hard drive erasure, the emergence of data erasure standards, and the evolution of faster and more complex flash-based storage media including the solid state drives. The answer to the number of passes to securely overwrite a hard drive permanently is not straightforward as it would involve several considerations including the technology, latest research findings, evolution of data erasure techniques, and recommended methods by governments and international agencies. How Many Passes Are Necessary For Permanently Wiping Hard Drives? In this article, we will provide answers to all the above questions and help you understand the mechanism of overwriting using different passes for Hard Drives and SSDs. Or which standard is suitable for a business or individual needing to perform permanent data erasure? Why do different global data erasure standards propose different overwriting passes? ![]() Is performing more overwriting passes better than just performing lesser or even one? So, the question that arises is why we need multiple passes for data destruction. Data erasure generally involves overwriting the data stored in media with single or multiple overwriting cycles or Passes which may range from 1 pass (zeroes) to 35 passes (Peter Gutmann). Performing Data Erasure on storage devices that can be re-used is the most environment-friendly and cost-effective approach to data destruction. The safest way to deal with devices at their disposal stage is to ensure they are permanently wiped and erased to ensure that data cannot be recovered even by laboratory techniques. Businesses need to realign their approach to how they deal with end-of-life equipment. Summary: Exponential growth of data and rising cases of data breach incidents have necessitated organizations to not overlook data security concerns at the end-of-life of IT assets.
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