3 ms·
If you write whole drive capacity of random data, you should be fine.
by effie 5y ago
If you write whole drive capacity of random data, you should be fine.
- robocat 5y agoNo. Say a particular model of SSD has over-provisioning of 10%, then even after writing the "whole" capacity of the drive, you can still be left with up to 10% of data recoverable from the Flash chips.
- effie 5y agoRight, so one better write 2x or 10x drive capacity of random data to it.
- isotopp 5y agoYou should be running flash with self-encryption (and make sure you have a drive that implements that correctly). To zap a drive you ask it to securely drop the self-encryption key. The data will still be there, but without the key it is indistinguishable from random noise.
- effie 5y agoWell who has time and energy to verify that. Just overwrite it several times, or destroy the drive.
- dannyw 5y agoFor some family photos? Probably. For sensitive material or crypto keys? Absolutely not, due to overprovisoning as mentioned (which can be way higher than 10% for enterprise drives), but also due to controllers potentially lying to you especially when drives have things like pSLC caches, etc.