For SSDs that doesn’t actually guarantee deletion - there could still be some over-provisioned erase blocks that have the old data due to wear leveling.

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jshier 4 days ago | parent [-]

Apple's SSDs are all encrypted at the controller nowadays. No need to rewrite, just reformat and it cycles the key, leaving any recoverable data irrevocably encrypted (until we break modern encryption).

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burnerthrow008 4 days ago | parent [-]

I thought all SSDs did that for wear-leveling purposes.

	▲	johncolanduoni 3 days ago \| parent [-]
		They do, but consumer ones usually don't implement the additional API (TCG Opal) that lets you lock/unlock the hardware encryption key. Without that capability you can't use it to implement full-disk encryption. They do usually implement the NVMe secure erase feature though, which will rotate it.