The Pentagon is even more paranoid: they use seven passes. But three passes is what the US Department of Energy uses to securely delete their files. You Only Need to Wipe a Disk Once to Securely Erase It The first notch to the right of “Fastest” writes over the entire drive with random data once the third notch, three times. That’s not what we want, so let’s move the slider. The first option, “Fastest,” will delete the partition but leave all files untouched. You’ll see a sliding scale with four options: Click the “Security Options” button on the bottom. : you do not want to erase some other hard drive by mistake! When you’re ready, click the “Erase” button. Make sure you click the drive you want to securely delete To wipe your mechanical drive, open Disk Utility, which you’ll find in Applications > Utilities.Ĭonnect the drive you want to securely delete, then click it in the sidebar. This is much more important for mechanical drives with spinning platters. your Mac is already deleting files completely to ensure fast write speeds later. NOTE: it’s not really necessary to overwrite files on an A single pass with random data will foil most recovery software, but if you’re as paranoid as the US government, you can run multiple passes as well. If you’re a Mac user, Disk Utility can write random information over any entire drive.
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