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Shredding my SSDs (NVMe) under linux?
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this post was submitted on 19 May 2025
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/dev/random, seriously? This will take ages and have no advantages over/dev/zero. Even when you really need to fill your drive with random data, use/dev/urandom, there's a chance that this will finish in couple days at least. And no, there's no guarantee that it will wipe all blocks because there are reserved blocks that only device firmware can access and rotate. Some data on rotated blocks still can be accessible for forensic analysis if you care about this.I think most modern distros use urandom for random too. These days, the PRNG is strong enough it doesn't need to stop and wait for more entropy.