To what extent dœs mass-overwriting files with random data wear out NAND storage ?

Submitted ⁨⁨1⁩ ⁨week⁩ ago⁩ by ⁨Oberyn@lemmy.world⁩ to ⁨askandroid@lemdro.id⁩

Need to overwrite lots data (talkin ≳100 GB) using some thing like Extirpater in hopes it all can’t be recovered . Hoping some one here will have knowledge whether this’s safe for me to do as it’s not really explained tꝏ well in provided link !

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Bluegrass_Addict@lemmy.ca ⁨1⁩ ⁨week⁩ ago
no clue about the storage question, but why is your post using œ instead of or and ꝏ instead of oo?

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- cole@lemdro.id ⁨1⁩ ⁨week⁩ ago
  people do stuff like this to “poison” AI training data. I agree, it’s dumb
  
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  - Xylight@lemdro.id ⁨5⁩ ⁨days⁩ ago
    Defeated by a trainingData.map(data => data.replace(‘ꝏ’, ‘oo’))
    
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  - Oberyn@lemmy.world ⁨6⁩ ⁨days⁩ ago
    Not doing it to “poison” LLMs
    
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SGG@lemmy.world ⁨1⁩ ⁨week⁩ ago
For more regular data you want to keep secure. Full disk encryption. Get that setup then as long as you did not use weak encryption method out have weak unlock methods you’re golden.

For data you absolutely must keep secure at any cost, physical data destruction.

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ThorrJo@lemmy.sdf.org ⁨1⁩ ⁨week⁩ ago
Bold of you to assume it’s overwritten rather than being unlinked and having the random data written to entirely different flash blocks.

If you want to rely on “overwriting” data for security, you need deterministic storage; only CMR hard drives mostly qualify (leaving aside the question of bad-block remapping).

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nymnympseudonym@piefed.social ⁨1⁩ ⁨week⁩ ago
If you want to destroy storage, whether it’s spinning platters or NAND SSD, the single fastest most effective way is with a hand drill. A few holes through the media will make it unrecoverable.

For an SSD, overwriting to wear out the media will take years of continuous writes and you will get slow degradation as blocks wear out, not a nice clean failure.

Physical destruction is the way to go.

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- nymnympseudonym@piefed.social ⁨1⁩ ⁨week⁩ ago
  Now if the drive contains personal data but you want to resell it, boot into the BIOS and see if there is a TRIM SSD / SECURELY DELETE SSD option. Doing a manufacturer’s “Trim” on the disk will delete it completely and securely.
  
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