![]() Boot to SystemRescueCD on the machine you’d like to securely erase.In testing, disks connected via a USB dock have also worked. This guide assumes an IDE, SATA, or PCIe connected disk.The default options should work, click the “Erase” button to wipe the container and securely sanitize the disk.When the physical disk has been selected, click the “Erase” button. In this particular example, the Physical disk is “Seagate Expansion Media”. ![]() To securely sanitize data on the disk, the entire container must be deleted. To delete the container, select the Physical disk from the Sidebar.Container disk3 = Logical container disk.Seagate Expansion Media = Physical disk.It is important to understand that simply reformatting the encrypted Volume is not enough. After confirming the disk is encrypted, the disk can be reformatted.If the machine does not have a removable hard drive, ETS recommends encrypting the disk first, and then proceeding with this guide. Verify that the target volume is encrypted with FileVault by selecting the volume from the Sidebar and viewing its details. If you find that the volume is not encrypted, you may want to use one of the “ Alternative Methods” for securely erasing data below. ![]() To display physical disks and containers, click the “ Sidebar” menu and select “ Show All Devices“. By default, Disk Utility only displays available volumes.
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